[Ooshima Ryou] Nao-san no Himegoto ~Moto Yan Gal Hitozuma, Teijisei Gakuen ni Kayou~ [Digital]

Explanation: The gyaru girl is a slut. The end.

sum it up like shit they're in a sort of adult school Where p.e is basically sex. Girl is 28 and married already with a kid the husband is the yakuza looking guy and the son is little boy. The guy is 21 and plays with their son a lot so they know each other. He conffeses to her and she basically gives in wanting a hs romance like in manga. They get caught by hobo looking guy he blackmails her and other students also fuck her. During summer she's basically only having sex with husband the 21 and the blackmailerd and not studying so she does bad in school and 21 argues with her and asks what she was doing. 2 other girls lead him off saying if they're not dating it's fine. Other guys gangrape her while those 3 are gone. So when the husband catches her getting gangbanged he's fine with it cus it's school.The other guys end up scared and let them have their affair destroy blackmail pics. Happy end for everyone except husband lol think she's pregnant with his kid as well in the end there.

Explain the damm story