Kaho lives a happy married life while living with her father-in-law. She hides her twisted sexual desire to be violated, which she cannot even tell her husband... One day, her father-in-law sees her in her underwear and becomes excited, and rapes her. Even though it is something that should never be tolerated, she becomes so excited that she climaxes many times... Remembering this, she indulges in masturbation, but in the end, she begs her father-in-law to violate her from behind. "Dad, I'm sorry I'm such a perverted daughter..."