Saimin Seishidou.

Hajime Tanaka uses his hypnosis abilities to hypnotize all of his classmates. He tells them that he is a sex instructor appointed by the government. All couples are required to receive instruction from him before having sex or even kissing, and everything he says is absolute. With this hypnosis in place, Hajime proceeds to take the virginity of countless girls while their boyfriends watch as if it were a tutorial.