Raping a beautiful girl in karate class

Hikari Aozora is a high school student, she is attending a karate class which is all men. She had a secret crush on a certain guy and unsuccessfully confessed to him. One day, seeing him being bullied by big guys in class, Hikari felt so sorry for him that she stood up to protect him. That made the other guys angry and she ended up being gang-raped in the classroom locker room.