Yoshida was jealous of his friend Takashi. That's because Takashi's mother, Sachiko, is too beautiful. Yoshida often hangs out at Takashi's house because he wants to see Sachiko. At first, Yoshida pretends to be calm, but when he goes to Takashi's house, he becomes worried about Sachiko's every move and gradually becomes uncontrollable. When Yoshida finds out that Sachiko is going to take a bath, he pretends to go to the bathroom and looks into the bathroom from the shadows, only to find Sachiko masturbating.
