百田 菜花

She is in the same grade and school as Haruta and Rio, and attends the same cram school as Haruta. One day on her way home from cram school, she witnesses Rio and Kaito being intimate, and becomes embroiled in an irreversible situation. Though she behaves as an honor student, she harbors strong sexual frustrations, and Kaito takes advantage of this and uses his cunning techniques to make her succumb to pleasure in the blink of an eye.