Mamoru, a gloomy boy who is bullied by the delinquent Satoshi every day and harbors resentment. Yuki, an upperclassman, notices Mamoru's desire for revenge and shows him a secret video. A video of a woman in a mask masturbating… His penis throbs with excitement as he watches his first erotic movie, but he feels like he has seen this woman somewhere before… It turns out to be Satoshi's mom in a compromising position. The two, having caught Satoshi's weakness, barge into his house, shake up the big-breasted mom, and demand sex. The perverted play escalates further, and the bullied boy finds an outlet for his revenge through the big-breasted mom.
