Ohio Rev. Code Ann. § 2907.05
(A) No person shall have sexual contact with another, not the spouse of the offender; cause another, not the spouse of the offender, to have sexual contact with the offender; or cause two or more other persons to have sexual contact when any of the following applies:
(C) Whoever violates this section is guilty of gross sexual imposition.
(2) Gross sexual imposition committed in violation of division (A)(4) or (B) of this section is a felony of the third degree. Except as otherwise provided in this division, for gross sexual imposition committed in violation of division (A)(4) or (B) of this section there is a presumption that a prison term shall be imposed for the offense. The court shall impose on an offender convicted of gross sexual imposition in violation of division (A)(4) or (B) of this section a mandatory prison term, as described in division (C)(3) of this section, for a felony of the third degree if either of the following applies: