Chotto TobashisugiZippin' Hoppin' Slammin' Our Love; ちょっとトバしすぎ

Masaki is a teenage senior high school student, whose boyfriend is 8 years older and his homeroom teacher, Tokuyama-sensei. As teacher and pupil, of course they need to keep it a secret, but both heart and body are carried away in this dangerous relationship because it's a passionate and erotic love! [from CT]