Azuki, a schoolgirl, lives alone with her stepfather. She had prior sexual experiences with her school teacher, but found them far less satisfying than she had imagined—though she didn't entirely dislike them. One day, the affair is exposed at school, and the teacher shows up at her home. In a fit of rage and desperation, he violently forces himself on her. After that, he begins visiting daily, and she repeatedly engages in sex with him. Yet, the question remains: what is it that Azuki truly desires?