Rieko has been single-handedly raising her son Shuichi. However, perhaps because she spoiled him too much, he has been acting selfishly and has even secretly bullied his classmate Hajime. When Rieko finds out, she goes to apologize on Shuichi's behalf, but... Enraged by the convenient offer, Hajime demands that she offer him physical servitude as an apology. She then corners the unsuspecting Shuichi and begins her revenge. To start with, she demands, "Give me your mother."