Saimin Seishidou - Secret Lesson Final by Dark One! - Adult Sex Game

The protagonist, Tanaka Hajime, hypnotizes the students and teachers at the school and becomes their "Sex Counsellor," under the guise of sex guidance, he gets to devour girls everyday. Taking their virginities in front of their boyfriends, he finds pleasure in having sex without the need to worry about any responsibility, spreading his lust all over the school.
And, many more of his schemes are yet to come......​