Hakkinbon: Kinbaku nikujuban

Original title: 発禁本 緊縛肉襦袢

Yayoi was filled with hatred when she saw her father Tokuzou and her stepmother Misayo entangled. She approached Yukio, who had hit on her, and decided to stage a fake kidnapping to see if Misayo loved her. However, Yukio had teamed up with Akihei, who had a grudge against Tokuzou, to make a quick buck. Soon Misayo showed up with the ransom money, and he was humiliated in Yayoi's place...