Childhood friends Ryoka Shigen and Ayumu Matsuzono. Ayumu secretly fell in love for Ryoka. Ryoka tells Ayumu that she still occasionally meets Yamato Aihara, who helped a group of karate clubs who had been involved in the past, and is asked to go out with her. Ryoka is undoubtedly persuaded by Yamato and devotes her pure body. A happy first experience, but it was a cunning trap that took advantage of Ryoka’s integrity. Next to the room, a group of karate clubs were peeking through the whole, and Ayumu was also confined there. Ayumu’s was full of madness when he saw Ryoka’s transformation in front of him, and he fell into a disappointing dong.