The parent-child relationship between Yuko and Koji was tight and they were in a state of cursing each other when they met face to face. When it comes to arguing on this day as well, Yuko abuses her with words that stimulate her sexual complex, saying, "I have little experience" and "I'm not popular." Yuko looks down at Koji who can't say anything back. Seeing his triumphant expression, Koji trembles with anger and decides to take revenge. The method was to take the mount with sex and sexually dominate Yuko.
