Yoshihito has a special crush on his friend Takeshi's mother, Ayumi. Every single thing Ayumi does gets him excited, to the point where he fantasizes about sex. One day, while visiting Takeshi's house, Yoshihito peeks at his crush Ayumi having a physical relationship with his friend Naoto. What's more, the two of them are enjoying the thrill of having Yoshihito at their house... Driven by intense jealousy and anger, Yoshihito attacks Ayumi, using her relationship with Naoto as an excuse...