Due to her parents' work, her cousin Rin moved to Tokyo five years ago, but she decides to stay at her relative Yuzuru's house for a week in the summer. Yuzuru is like an older brother two years older than Rin. Since I was little, I've been playing with Rin often by catching insects. Yuzuru's parents were also away from part-time work, but they met again for the first time in a while, but Rin, who thought he was still a child, has a cute face and has grown to an unbelievable extent. Yuzuru, who has always masturbated, witnesses Rin naked in the bath, and his erection becomes uncontrollable.
