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 she 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. Then Yoshida, who knew that Sachiko was going to take a bath, pretended to go to the bathroom and went to look into the bathroom from the shadows.
