First collaboration with popular youth douujin works! !! Natsumi, a female mane who is dating ace Yuma of the baseball club. One day, they inadvertently cause an accident and injure the back-up pitcher Leo. Feeling her fault, Natsumi heads to her home in Leo alone and is forced to help her masturbate in place of her injured right hand. At a crucial time in the summer tournament, she didn't want to bother him and kept only demanding Leo to escalate, but she gradually wanted herself ...