She is the ideal young wife, pure, chaste, and devoted. She would never cheat on her husband. One day, her husband's friend attacks her, after she has sex with him, but she firmly rejects him. In the midst of her resistance, Kokoro eyes are captured by a huge cock. She is overwhelmed by its size, and from the moment it is inserted, the chaste young wife ceases to be human. She becomes obsessed with the other man's cock, and becomes a pervert who repeatedly engages in sex while constantly yelling about how it is different from her husband's cock.