Yuta's father brought Iroha home to introduce her to his son. At first, Iroha saw Yuta as a well-behaved and friendly boy. But after they started living together, Yuta refused to go to school and began to rebel against his parents. There was even a time when Iroha caught Yuta masturbating to a photo of herself! Yuta also realized that Iroha had seen him. That night, Iroha went downstairs to get some water and found Yuta still awake. As she was about to go back to her room, he stopped her, forcefully taking her body! Since then, Yuta has always seen Iroha as an object to satisfy his sexual desires. He pretends to be a good boy in front of his father, but secretly sleeps with his wife. Iroha has to admit that Yuta is very skilled in sexual matters. Despite being forced, Yuta has made her climax over and over again. She has also become more proactive, enjoying sexual pleasure with him. Iroha even rejects her husband when he wants to make love, going to Yuta's room instead, letting him ejaculate inside her...