Gang raped daily by her son's classmates - OBA-173

Sayuri, whose husband died young, is raising her son Takeo alone. Takeo is currently going through a rebellious phase, and Sayuri carefully manages her relationships. However, one day, Takeo's classmate, Koji, comes to their house. Koji, who had broken up with Takeo, harbors deep hatred for him and brings a group of nasty friends to Takeo's house the next day…