Noa, a female college student, got a part-time job as a tutor. She thought she could easily handle it if she was a tutor at the elementary school student level, but the students she was assigned to, "Sho-ta" and "Miyoshi," were hardened delinquents. One day, Noa, in a fit of anger, slapped Miyoshi. Noa, whose entire ordeal was filmed on Sho-ta's smartphone and whose weakness was grasped, ends up having lewd pranks done to her impressive big breasts by the masochistic delinquents…