Exhibit 99(h)(15)

ADMINISTRATION AGREEMENT

This Administration Agreement (“Agreement”) dated and effective as of May 2, 2016, is by and between State Street Bank and Trust Company, a Massachusetts trust company (the “Administrator”), and Ohio National Fund, Inc., a Maryland corporation (the “Corporation”).

WHEREAS, the Corporation is an open-end management investment company currently comprised of multiple series (each, a “Fund” and collectively, the “Funds”), and is registered with the U.S. Securities and Exchange Commission (“SEC”) by means of a registration statement (“Registration Statement”) under the Securities Act of 1933, as amended (“1933 Act”), and the Investment Company Act of 1940, as amended (the “1940 Act”); and

WHEREAS, the Corporation desires to retain the Administrator to furnish certain administrative services to the Corporation, and the Administrator is willing to furnish such services, on the terms and conditions set forth in this Agreement.

NOW, THEREFORE, in consideration of the premises and mutual covenants herein contained, the parties hereto agree as follows:

1. APPOINTMENT OF ADMINISTRATOR

The Corporation hereby appoints the Administrator to act as administrator to the Corporation for purposes of providing certain administrative services for the period and on the terms set forth in this Agreement. The Administrator accepts such appointment and agrees to render the services stated herein.

The Corporation currently consists of the Fund(s) and their respective classes of shares as listed in Schedule A to this Agreement. In the event that the Corporation establishes one or more additional Fund(s) with respect to which it wishes to retain the Administrator to act as administrator hereunder, the Corporation shall notify the Administrator in writing. Upon written acceptance by the Administrator, such Fund(s) shall become subject to the provisions of this Agreement to the same extent as the existing Fund, except to the extent that such provisions (including those relating to compensation and expenses payable) may be modified with respect to such Fund in writing by the Corporation and the Administrator at the time of the addition of such Fund.

2. DELIVERY OF DOCUMENTS

The Corporation will promptly deliver to the Administrator copies of each of the following documents and all future amendments and supplements, if any:

a. The Corporation’s Articles of Incorporation and By-laws (“Governing Documents”);

b. The Corporation’s currently effective Registration Statement under the 1933 Act and the 1940 Act and each Prospectus and Statement of Additional Information (“SAI”) relating to the Fund(s) and all amendments and supplements thereto as in effect from time to time;

c. Copies of the resolutions of the Board of Directors of the Corporation (the “Board”) certified by the Corporation’s Secretary authorizing (1) the Corporation to enter into this Agreement and (2) certain individuals on behalf of the Corporation to (a) give instructions to the Administrator pursuant to this Agreement and (b) sign checks and pay expenses;

d. A copy of the investment advisory agreement between the Corporation and its investment adviser; and

e. Such other certificates, documents or opinions which the Administrator may, in its reasonable discretion, deem necessary or appropriate in the proper performance of its duties.

3. REPRESENTATIONS AND WARRANTIES OF THE ADMINISTRATOR

The Administrator represents and warrants to the Corporation that:

a. It is a Massachusetts trust company, duly organized and existing under the laws of The Commonwealth of Massachusetts;

b. It has the requisite power and authority to carry on its business in The Commonwealth of Massachusetts;

c. All requisite corporate proceedings have been taken to authorize it to enter into and perform this Agreement;

d. No legal or administrative proceedings have been instituted or threatened which would materially impair the Administrator’s ability to perform its duties and obligations under this Agreement; and

e. Its entrance into this Agreement shall not cause a material breach or be in material conflict with any other agreement or obligation of the Administrator or any law or regulation applicable to it.

4. REPRESENTATIONS AND WARRANTIES OF THE CORPORATION

The Corporation represents and warrants to the Administrator that:

a. It is a corporation, duly organized, existing and in good standing under the laws of its state of formation;

b. It has the requisite power and authority under applicable laws and by its Articles of Incorporation and By-laws to enter into and perform this Agreement;

2

c. All requisite proceedings have been taken to authorize it to enter into and perform this Agreement;

d. It is an investment company properly registered with the SEC under the 1940 Act;

e. The Registration Statement been filed and will be effective and remain effective during the term of this Agreement. The Corporation also warrants to the Administrator that as of the effective date of this Agreement, all necessary filings under the securities laws of the states in which the Corporation offers or sells its shares have been made;

f. No legal or administrative proceedings have been instituted or threatened which would impair the Corporation’s ability to perform its duties and obligations under this Agreement;

g. Its entrance into this Agreement will not cause a material breach or be in material conflict with any other agreement or obligation of the Corporation or any law or regulation applicable to it; and

h. Where information provided by the Corporation or the Corporation’s Investors includes information about an identifiable individual (“Personal Information”), the Corporation represents and warrants that it has obtained all consents and approvals, as required by all applicable laws, regulations, by-laws and ordinances that regulate the collection, processing, use or disclosure of Personal Information, necessary to disclose such Personal Information to the Administrator, and as required for the Administrator to use and disclose such Personal Information in connection with the performance of the services hereunder. The Corporation acknowledges that the Administrator may perform any of the services, and may use and disclose Personal Information outside of the jurisdiction in which it was initially collected by the Corporation, including the United States and that information relating to the Corporation, including Personal Information may be accessed by national security authorities, law enforcement and courts. The Administrator shall be kept indemnified by and be without liability to the Corporation for any action taken or omitted by it in reliance upon this representation and warranty, including without limitation, any liability or costs in connection with claims or complaints for failure to comply with any applicable law that regulates the collection, processing, use or disclosure of Personal Information.

5. ADMINISTRATION SERVICES

The Administrator shall provide the services as listed on Schedule B, subject to the authorization and direction of the Corporation and, in each case where appropriate, the review and comment by the Corporation’s independent accountants and legal counsel and in accordance with procedures which may be established from time to time between the Corporation and the Administrator.

3

The Administrator shall perform such other services for the Corporation that are mutually agreed to by the parties from time to time, for which the Corporation will pay such fees as may be mutually agreed upon, including the Administrator’s reasonable out-of-pocket expenses. The provision of such services shall be subject to the terms and conditions of this Agreement.

The Administrator shall provide the office facilities and the personnel determined by it to perform the services contemplated herein.

6. COMPENSATION OF ADMINISTRATOR; EXPENSE REIMBURSEMENT; CORPORATION EXPENSES

The Administrator shall be entitled to reasonable compensation for its services and expenses, as agreed upon from time to time in writing between the Corporation on behalf of each applicable Fund and the Administrator.

The Corporation agrees promptly to reimburse the Administrator for any equipment and supplies specially ordered by or for the Corporation through the Administrator and for any other expenses not contemplated by this Agreement that the Administrator may incur on the Corporation’s behalf at the Corporation’s request or with the Corporation’s consent.

The Corporation will bear all expenses that are incurred in its operation and not specifically assumed by the Administrator. For the avoidance of doubt, Corporation expenses not assumed by the Administrator include, but are not limited to: organizational expenses; cost of services of independent accountants and outside legal and tax counsel (including such counsel’s review of the Registration Statement, Form N-CSR, Form N-Q, Form N-PX, Form N-MFP, Form N-SAR, proxy materials, federal and state tax qualification as a regulated investment company and other notices, registrations, reports, filings and materials prepared by the Administrator under this Agreement); cost of any services contracted for by the Corporation directly from parties other than the Administrator; cost of trading operations and brokerage fees, commissions and transfer taxes in connection with the purchase and sale of securities for the Corporation; investment advisory fees; taxes, insurance premiums and other fees and expenses applicable to its operation; costs incidental to any meetings of shareholders including, but not limited to, legal and accounting fees, proxy filing fees and the costs of preparation (e.g., typesetting, XBRL-tagging, page changes and all other print vendor and EDGAR charges, collectively referred to herein as “Preparation”), printing, distribution and mailing of any proxy materials; costs incidental to Board meetings, including fees and expenses of Board members; the salary and expenses of any officer, director\trustee or employee of the Corporation; costs of Preparation, printing, distribution and mailing, as applicable, of the Corporation’s Registration Statements and any amendments and supplements thereto and shareholder reports; cost of Preparation and filing of the Corporation’s tax returns, Form N-1A, Form N-CSR, Form N-Q, Form N-PX, Form N-MFP and Form N-SAR, and all notices, registrations and amendments associated with applicable federal and state tax and securities laws; all applicable registration fees and filing fees required under federal and state securities laws; the cost of fidelity bond and D&O/E&O liability insurance; and the cost of independent pricing services used in computing the Fund(s)’ net asset value.

4

7. INSTRUCTIONS AND ADVICE

At any time, the Administrator may apply to any officer of the Corporation or his or her designee for instructions or the independent accountants for the Corporation, with respect to any matter arising in connection with the services to be performed by the Administrator under this Agreement. The Administrator shall be entitled to rely on and may act upon advice of counsel (who may be counsel for the Corporation) on all matters, and shall be without liability for any action reasonably taken or omitted pursuant to such advice.

The Administrator shall not be liable for any action taken or omitted by it in good faith in reliance upon any such instructions or advice or upon any paper or document believed by it to be genuine and to have been signed by the proper person or persons. The Administrator shall not be held to have notice of any change of authority of any person until receipt of written notice thereof from the Fund(s). Nothing in this section shall be construed as imposing upon the Administrator any obligation to seek such instructions or advice, or to act in accordance with such advice when received.

8. LIMITATION OF LIABILITY AND INDEMNIFICATION

The Administrator shall be responsible for the performance only of such duties as are set forth in this Agreement and, except as otherwise provided under Section 14, shall have no responsibility for the actions or activities of any other party, including other service providers. The Administrator shall have no liability in respect of any loss, damage or expense suffered by the Corporation insofar as such loss, damage or expense arises from the performance of the Administrator’s duties hereunder in reliance upon records that were maintained for the Corporation by entities other than the Administrator prior to the Administrator’s appointment as administrator for the Corporation. The Administrator shall have no liability for any error of judgment or mistake of law or for any loss or damage resulting from the performance or nonperformance of its duties hereunder unless solely caused by or resulting from the negligence or willful misconduct of the Administrator, its officers or employees. In no event shall the Administrator or the Corporation be liable for any special, indirect, incidental, punitive or consequential damages, including lost profits, of any kind whatsoever (including, without limitation, attorneys’ fees) under any provision of this Agreement or for any such damages arising out of any act or failure to act hereunder, each of which is hereby excluded by agreement of the parties regardless of whether such damages were foreseeable or whether either party or any entity had been advised of the possibility of such damages; provided, however, that the Corporation shall be liable to the extent that such damages result from any actions or inactions of the Administrator (including its agents and sub-custodians) made in reliance upon instructions from any officer of the Corporation (or his or her designee) received pursuant to Section 7. In any event, the Administrator’s cumulative liability for each calendar year (a “Liability Period”) with respect to the Corporation under this Agreement regardless of the form of action or legal theory shall be limited to two (2) times its total annual compensation earned and fees payable hereunder during the preceding Compensation Period, as defined herein, for any liability or loss suffered by the Corporation including, but not limited to,

5

any liability relating to qualification of the Corporation as a regulated investment company or any liability relating to the Corporation’s compliance with any federal or state tax or securities statute, regulation or ruling during such Liability Period. “Compensation Period” shall mean the calendar year ending immediately prior to each Liability Period in which the event(s) giving rise to the Administrator’s liability for that period have occurred. Notwithstanding the foregoing, the Compensation Period for purposes of calculating the annual cumulative liability of the Administrator for the Liability Period commencing on the date of this Agreement and terminating on December 31, 2016 shall be the date of this Agreement through December 31, 2016, calculated on an annualized basis, and the Compensation Period for the Liability Period commencing January 1, 2017 and terminating on December 31, 2017 shall be the date of this Agreement through December 31, 2016, calculated on an annualized basis.

The Administrator shall not be responsible or liable for any failure or delay in performance of its obligations under this Agreement arising out of or caused, directly or indirectly, by circumstances beyond its control, including without limitation, work stoppage, power or other mechanical failure, computer virus, natural disaster, governmental action or communication disruption.

The Corporation shall indemnify and hold the Administrator and its directors, officers, employees and agents harmless from all loss, cost, damage and expense, including reasonable fees and expenses for counsel, incurred by the Administrator resulting from any claim, demand, action or suit in connection with the Administrator’s acceptance of this Agreement, any action or omission by it in the performance of its duties hereunder, or as a result of acting upon any instructions reasonably believed by it to have been duly authorized by the Corporation or upon reasonable reliance on information or records given or made by the Corporation or its investment adviser, provided that this indemnification shall not apply to actions or omissions of the Administrator, its officers or employees in cases of its or their own negligence or willful misconduct.

The limitation of liability and indemnification contained herein shall survive the termination of this Agreement.

9. CONFIDENTIALITY

All information provided under this Agreement by a party (the “Disclosing Party”) to the other party (the “Receiving Party”) regarding the Disclosing Party’s business and operations shall be treated as confidential. Subject to Section 10 below, all confidential information provided under this Agreement by Disclosing Party shall be used, including disclosure to third parties, by the Receiving Party, or its agents or service providers, solely for the purpose of performing or receiving the services and discharging the Receiving Party’s other obligations under the Agreement or managing the business of the Receiving Party and its Affiliates (as defined in Section 10 below), including financial and operational management and reporting, risk management, legal and regulatory compliance and client service management. The foregoing shall not be applicable to any information (a) that is publicly available when provided or thereafter becomes publicly available, other than through a breach of this Agreement, (b) that is independently derived by the Receiving Party without the use of any information provided by the

6

Disclosing Party in connection with this Agreement, (c) that is disclosed as required to comply with the requirements of any market infrastructure that the Disclosing Party or its agents direct the Administrator or its Affiliates to employ (or which is required in connection with the holding or settlement of instruments included in the assets subject to this Agreement), or (d) where the party seeking to disclose has received the prior written consent of the party providing the information, which consent shall not be unreasonably withheld. Notwithstanding the above provisions of this Section 9, the Receiving Party may disclose confidential information of the Disclosing Party to its regulatory authorities or if such disclosure is otherwise required to comply with any legal or regulatory proceeding, investigation, audit, examination, subpoena, civil investigative demand or other similar process, or as required by operation of law or regulation. The Receiving Party shall, unless prohibited from doing so, endeavor to provide the Disclosing Party with notice of such disclosure as soon as reasonably practicable so that the Disclosing Party may seek an appropriate protective order, and shall reasonably cooperate with the Disclosing Party, at the Disclosing Party’s expense, if it decides to seek a protective order.

10. USE OF DATA

(a) In connection with the provision of the services and the discharge of its other obligations under this Agreement, the Administrator (which term for purposes of this Section 10 includes each of its parent company, branches and affiliates (“Affiliates”)) may collect and store information regarding the Corporation or Fund and share such information with its Affiliates, agents and service providers in order and to the extent reasonably necessary (i) to carry out the provision of services contemplated under this Agreement and other agreements between the Corporation and the Administrator or any of its Affiliates and (ii) to carry out management of its businesses, including, but not limited to, financial and operational management and reporting, risk management, legal and regulatory compliance and client service management.

(b) Subject to paragraph (c) below, the Administrator and/or its Affiliates (except those Affiliates or business divisions principally engaged in the business of asset management) may use any data or other information (“Data”) obtained by such entities in the performance of their services under this Agreement or any other agreement between the Corporation and the Administrator or one of its Affiliates, including Data regarding transactions and portfolio holdings relating to the Corporation/Fund, and publish, sell, distribute or otherwise commercialize the Data; provided that, unless the Corporation otherwise consents, Data is combined or aggregated with information relating to (i) other customers of the Administrator and/or its Affiliates or (ii) information derived from other sources, in each case such that any published information will be displayed in a manner designed to prevent attribution to or identification of such Data with the Corporation/Fund. The Corporation agrees that Administrator and/or its Affiliates may seek to profit and realize economic benefit from the commercialization and use of the Data, that such benefit will constitute part of the Administrator’s compensation for services under this Agreement or such other agreement, and the Administrator and/or its Affiliates shall be entitled to retain and not be required to disclose the amount of such economic benefit and profit to the Corporation/Fund.

7

(c) Except as expressly contemplated by this Agreement, nothing in this Section 10 shall limit the confidentiality and data-protection obligations of the Administrator and its Affiliates under this Agreement and applicable law. The Administrator shall cause any Affiliate, agent or service provider to which it has disclosed Data pursuant to this Section 10 to comply at all times with confidentiality and data-protection obligations as if it were a party to this Agreement.

11. COMPLIANCE WITH GOVERNMENTAL RULES AND REGULATIONS; RECORDS

The Corporation assumes full responsibility for complying with all securities, tax, commodities and other laws, rules and regulations applicable to it.

In compliance with the requirements of Rule 31a-3 under the 1940 Act, the Administrator agrees that all records which it maintains for the Corporation shall at all times remain the property of the Corporation, shall be readily accessible during normal business hours, and shall be promptly surrendered upon the termination of the Agreement or otherwise on written request except as otherwise provided in Section 13. The Administrator further agrees that all records that it maintains for the Corporation pursuant to Rule 31a-1 under the 1940 Act will be preserved for the periods prescribed by Rule 31a-2 under the 1940 Act unless any such records are earlier surrendered as provided above. Records may be surrendered in either written or machine-readable form, at the option of the Administrator. In the event that the Administrator is requested or authorized by the Corporation, or required by subpoena, administrative order, court order or other legal process, applicable law or regulation, or required in connection with any investigation, examination or inspection of the Corporation by state or federal regulatory agencies, to produce the records of the Corporation or the Administrator’s personnel as witnesses or deponents, the Corporation agrees to pay the Administrator for the Administrator’s time and expenses, as well as the fees and expenses of the Administrator’s counsel incurred in such production.

12. SERVICES NOT EXCLUSIVE

The services of the Administrator are not to be deemed exclusive, and the Administrator shall be free to render similar services to others. The Administrator shall be deemed to be an independent contractor and shall, unless otherwise expressly provided herein or authorized by the Corporation from time to time, have no authority to act or represent the Corporation in any way or otherwise be deemed an agent of the Corporation.

13. EFFECTIVE PERIOD AND TERMINATION

This Agreement shall remain in full force and effect for an initial term ending May 2, 2019 (the “Initial Term”). After the expiration of the Initial Term, this Agreement shall automatically renew for successive 1-year terms (each, a “Renewal Term”) unless a written notice of non-renewal is delivered by the non-renewing party no later than ninety (90) days prior to the expiration of the Initial Term or any Renewal Term, as the case may be. A written notice of non-renewal may be given as to the Corporation or a Fund. During the Initial Term and thereafter, either party may terminate this Agreement as to the Corporation or a Fund: (i) in the event of the other party’s material breach of a material provision of this Agreement that the other party has either (a) failed to cure or (b) failed to establish a remedial plan to cure that is reasonably acceptable, within 60 days’ written notice of such breach, or (ii) in the event of the

8

appointment of a conservator or receiver for the other party or upon the happening of a like event to the other party at the direction of an appropriate agency or court of competent jurisdiction. Upon termination of this Agreement pursuant to this paragraph with respect to the Corporation or any Fund, the Corporation or applicable Fund shall pay Administrator its compensation due and shall reimburse Administrator for its costs, expenses and disbursements.

In the event of: (i) the Corporation’s termination of this Agreement with respect to the Corporation or a Fund for any reason other than as set forth in the immediately preceding paragraph or (ii) a transaction not in the ordinary course of business pursuant to which the Administrator is not retained to continue providing services hereunder to the Corporation or a Fund (or its respective successor), the Corporation or applicable Fund shall pay the Administrator its compensation due through the end of the then-current term (based upon the average monthly compensation previously earned by Administrator with respect to the Corporation or such Fund) and shall reimburse the Administrator for its costs, expenses and disbursements. Upon receipt of such payment and reimbursement, the Administrator will deliver the Corporation’s or such Fund’s records as set forth herein. For the avoidance of doubt, no payment will be required pursuant to this paragraph in the event of any transaction consisting of (a) the liquidation or dissolution of the Corporation or a Fund and distribution of the Corporation’s or such Fund’s assets as a result of the Board’s determination in its reasonable business judgment that the Corporation or such Fund is no longer viable (b) a merger of the Corporation or a Fund into, or the consolidation of the Corporation or a Fund with, another entity, or (c) the sale by the Corporation or a Fund of all, or substantially all, of the Corporation’s or Fund’s assets to another entity, in each of (b) and (c) where the Administrator is retained to continue providing services to the Corporation or such Fund (or its respective successor) on substantially the same terms as this Agreement.

Termination of this Agreement with respect to any one particular Fund shall in no way affect the rights and duties under this Agreement with respect to the Corporation or any other Fund.

14. EMPLOYMENT OF OTHERS

The Administrator may employ, engage, associate or contract with such person or persons, including, without limitation, affiliates and subsidiaries of the Administrator, as the Administrator may deem desirable to assist it in performing its duties under this Agreement without the consent of the Corporation; provided, however, that the compensation of such person or persons shall be paid by the Administrator and that the Administrator shall be as fully responsible to the Corporation for the acts and omissions of any such person or persons as it is for its own acts and omissions under this Agreement.

15. INTERPRETIVE AND ADDITIONAL PROVISIONS

In connection with the operation of this Agreement, the Administrator and the Corporation on behalf of each of the Funds, may from time to time agree on such provisions interpretive of or in addition to the provisions of this Agreement as may in their joint opinion be consistent with the general tenor of this Agreement. Any such interpretive or additional provisions shall be in a writing signed by all parties, provided that no such interpretive or additional provisions shall contravene any applicable laws or regulations or any provision of the Corporation’s Governing Documents. No interpretive or additional provisions made as provided in the preceding sentence shall be deemed to be an amendment of the Agreement.

9

16. NOTICES

Any notice, instruction or other instrument required to be given hereunder will be in writing and may be sent by hand, or by facsimile transmission, or overnight delivery by any recognized delivery service, to the parties at the following address or such other address as may be notified by any party from time to time:

If to the Corporation:

OHIO NATIONAL FUND, INC.

One Financial Way

Montgomery, Ohio 45242

Attn: Vice President, Mutual Funds

Telephone: 513-794-6971

Facsimile: 513-794-4506

If to the Administrator:

STATE STREET BANK AND TRUST COMPANY

801 Pennsylvania Avenue

Tower I

Kansas City, Missouri 64105

Attention: Chris Travalent, Vice President

Telephone: 816-871-3293

with a copy to:

STATE STREET BANK AND TRUST COMPANY

Legal Division – Global Services Americas

One Lincoln Street

Boston, MA 02110

Attention: Senior Vice President and Senior Managing Counsel

17. AMENDMENT

This Agreement may be amended at any time in writing by mutual agreement of the parties hereto.

18. ASSIGNMENT

This Agreement shall not be assigned by either party hereto without the prior consent in writing of the other party, except that the Administrator may assign this Agreement to a successor of all or a substantial portion of its business, or to a party controlling, controlled by or under common control with the Administrator.

10

19. SUCCESSORS

This Agreement shall be binding on and shall inure to the benefit of the Corporation and the Administrator and their respective successors and permitted assigns.

20. DATA PROTECTION

The Administrator shall implement and maintain a comprehensive written information security program that contains appropriate security measures to safeguard the personal information of the Corporation’s shareholders, employees, directors and/or officers that the Administrator receives, stores, maintains, processes or otherwise accesses in connection with the provision of services hereunder. For these purposes, “personal information” shall mean (i) an individual’s name (first initial and last name or first name and last name), address or telephone number plus (a) social security number, (b) driver’s license number, (c) state identification card number, (d) debit or credit card number, (e) financial account number or (f) personal identification number or password that would permit access to a person’s account or (ii) any combination of the foregoing that would allow a person to log onto or access an individual’s account. Notwithstanding the foregoing “personal information” shall not include information that is lawfully obtained from publicly available information, or from federal, state or local government records lawfully made available to the general public.

21. ENTIRE AGREEMENT

This Agreement contains the entire understanding between the parties hereto with respect to the subject matter hereof and supersedes all previous representations, warranties or commitments regarding the services to be performed hereunder whether oral or in writing.

22. WAIVER

The failure of a party to insist upon strict adherence to any term of this Agreement on any occasion shall not be considered a waiver nor shall it deprive such party of the right thereafter to insist upon strict adherence to that term or any term of this Agreement or the failure of a party hereto to exercise or any delay in exercising any right or remedy under this Agreement shall not constitute a waiver of any such term, right or remedy or a waiver of any other rights or remedies, and no single or partial exercise of any right or remedy under this Agreement shall prevent any further exercise of the right or remedy or the exercise or any other right or remedy. Any waiver must be in writing signed by the waiving party.

11

23. SEVERABILITY

If any provision or provisions of this Agreement shall be held to be invalid, unlawful or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired.

24. GOVERNING LAW

This Agreement shall be construed and the provisions thereof interpreted under and in accordance with the laws of The Commonwealth of Massachusetts, without regard to its conflicts of laws rules.

25. REPRODUCTION OF DOCUMENTS

This Agreement and all schedules, exhibits, attachments and amendments hereto may be reproduced by any photographic, xerographic, photostatic, microfilm, micro-card, miniature photographic or other similar process. The parties hereto all/each agree that any such reproduction shall be admissible in evidence as the original itself in any judicial or administrative proceeding, whether or not the original is in existence and whether or not such reproduction was made by a party in the regular course of business, and that any enlargement, facsimile or further reproduction of such reproduction shall likewise be admissible in evidence.

26. COUNTERPARTS

This Agreement may be executed in several counterparts, each of which shall be deemed to be an original, and all such counterparts taken together shall constitute one and the same Agreement. Counterparts may be executed in either original or electronically transmitted form (e.g., faxes or emailed portable document format (PDF) form), and the parties hereby adopt as original any signatures received via electronically transmitted form.

[Remainder of page intentionally left blank.]

12

Exhibit 99(h)(15)

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed by their officers designated below as of the date first written above.

OHIO NATIONAL FUND, INC.
By:
Name:
Title:
STATE STREET BANK AND TRUST COMPANY
By:
Name:	Gunjan Kedia
Title:	Executive Vice President

ADMINISTRATION AGREEMENT

SCHEDULE A

Listing of Fund(s)

Ohio National Fund, Inc.

Aggressive Growth Portfolio

Balanced Portfolio

Bond Portfolio

Bristol Growth Portfolio

Bristol Portfolio

Bryton Growth Portfolio

Capital Appreciation Portfolio

ClearBridge Small Cap Portfolio

Equity Portfolio

High Income Bond Portfolio

International Portfolio

International Small-Mid Company Portfolio

Mid Cap Opportunity Portfolio

Nasdaq-100 Index Portfolio

Omni Portfolio

Risk Managed Balanced Portfolio

S&P 500 Portfolio

Small Cap Growth Portfolio

Strategic Value Portfolio

Target VIP Portfolio

A-1

ADMINISTRATION AGREEMENT

SCHEDULE B

LIST OF SERVICES

I. Fund Administration Treasury Services as described in Schedule B1 attached hereto;

II. Fund Administration Tax Services as described in Schedule B2 attached hereto;

III. [Reserved];

IV. [Reserved]; and

V. [Reserved].

Schedule B1

Fund Administration Treasury Services

a. Provide periodic testing of the Fund(s) with respect to compliance with the Internal Revenue Code’s mandatory qualification requirements, including quarterly compliance reporting to the designated officer(s) of the Corporation as well as preparation of Board compliance materials; and

b. Prepare and furnish total return performance information for the Fund(s), including such information on an after-tax basis, calculated in accordance with applicable U.S. securities laws and regulations, as may be reasonably requested by Corporation management.

SCHEDULE B2

Fund Administration Tax Services

a. Prepare annual income tax basis provisions, including wash sales and all tax financial statement disclosure;

b. Prepare the Funds’ annual federal, and state income tax returns and extension requests for review and for execution and filing by the Corporation’s independent accountants and execution and filing by the Corporation’s treasurer;

c. Quarterly review of Internal Revenue Code Regulated Investment Company qualification tests; and

d. Participate in discussions of potential tax issues with the Funds and the Funds’ audit firm.

Tax services, as described in this Schedule, do not include identification of passive foreign investment companies, qualified interest income securities or Internal Revenue Code Section 1272(a)(6) tax calculations for asset backed securities.