Hiroshi and Yuka have known each other for a while, and he often comes to her house to visit. Eric is Yuka's mother and she raised Yuka alone since she was a child. As a single mother, I have been in love for a long time. She was jealous when she saw her daughter happy with her boyfriend. Hiroshi has had a part-time job as a porter since he was a student, helping him build a strong body. Eri was attracted to his body, so what she did was very wrong … That's seducing my daughter's boyfriend! Hiroshi also secretly admired Eri's body, so when she seduced him, he quickly confessed and began their abusive relationship …