Miyabi married a man she met at work. She was living happily with her husband, but she was at a loss because her stepchild, Yusei, did not open up to her. She tries to get closer to him, but Yusei, who has grown distrustful of women due to his past of being betrayed by his previous mother, tries to use her as a sex tool and chase her away... Miyabi continues to follow his orders in search of family connections, but Yusei brings her classmate into his house and continues to play with her even more mercilessly. And Miyabi faces endless days of shame...