One day, Ken's mother tells him, "My friend Naomi is coming to stay," leaving him confused. This is because three years ago, when Naomi came to stay the night, Ken tried to attack her while she was asleep... Although the attempt failed, Ken was too awkward to turn his face towards her. That night, Naomi comes home drunk with her mother and confesses that she knew everything, and kisses the innocent Ken. She then tells him, "Come to my room when mom is asleep."