After being deprived of intimacy with her husband for a long time, Ai had poured all her affection onto her son Takashi. One day, she witnesses Takashi being bullied and invites the ringleader, Tanaka, into her home in an attempt to stop the abuse. When she pleads with Tanaka to end the bullying, he mocks her and demands she strip naked. Willing to sacrifice her body for her son's sake, Ai undresses. However, seeing her exposed form only intensifies the bullies' desires, and the situation spirals into repeated sexual assault, creampie after creampie, as Ai is humiliated and forced to climax again and again.