No, Minnesota's got one. First Degree Criminal Sexual Misconduct has an exception of forty-eight months. I know, four years. But that's how the statute is written. Of course, that could just bump it down to a lesser offense; I didn't look that closely.
609.345 Criminal sexual conduct in the fourth degree. 10y max sentence.
Crime defined. A person who engages in sexual contact with another person is guilty of criminal sexual conduct in the fourth degree if any of the following circumstances exists:
...
(f) the actor has a significant relationship to the complainant and the complainant was at least 16 but under 18 years of age at the time of the sexual contact. Neither mistake as to the complainant's age nor consent to the act by the complainant is a defense;