533.03 UNLAWFUL SEXUAL CONDUCT WITH A MINOR.
   (a)   No person, who is eighteen years of age or older, shall engage in sexual conduct with another, who is not the spouse of the offender, when the offender knows the other person is thirteen years of age or older but less than sixteen years of age, or the offender is reckless in that regard.
   (b)   Whoever violates this section is guilty of unlawful sexual conduct with a minor, a misdemeanor of the first degree.  If the offender is four years older or more than the other person, or if the offender has previously been convicted of or pleaded guilty to a violation of Ohio R.C. 2907.02, 2907.03 or 2907.04, or former Ohio R.C. 2907.12, unlawful sexual conduct with a minor is a felony and shall be prosecuted under appropriate State law.
(ORC 2907.04)