A man who has a grudge against a female classmate contacts a molester on an online bulletin board and asks him to molest her on his behalf! On the day, while riding the usual train, a stranger gropes her ass! The molester's actions escalate, and he inserts his penis raw from behind! Even though she has come, she is frustrated and embarrassed that she came from the molester, and when she can't say anything, the persistent piston continues to make her cum even more, and she cums inside! The tragedy is not over yet...