Shizuku and Yui are idol girls at the school, and Hosoda is dating Shizuku. - He is a cruel man. - He tied up Shizuku every time something happened. - Yui is bisexual and has a boyfriend, but she has intense romantic feelings for Shizuku. - Yui comes to Shizuku's house and demands that she break up with Hosoda, then has sex with Shizuku. - Hosoda, who is a bondage addict and jealous, sees the two having sex on a hidden camera set up in Shizuku's room, and becomes enraged and becomes hostile.