Buruma Shiru ~Nikuyoku Shoujo Ningyou~

For killing some time meeting a friend, Hiroto walked around in the school building after school.
And he heard gasping voices of a girl from his classroom...
Shit, who's gonna make my classroom smell like p**sy...!!
When he looked inside of the room, a female classmate, Kinoshita Airi, was masturbating in there.
He knew of her sexual perversity. Hitoro who has a fetish toward gym shorts, forced her to wear a bloomers, and violate her body...
Kouichi, a friend of Hiroto, possessed Maiha as a sex slave too...

[From DLsite English]