Adult Only Institute

Chi-soo is a high school student who has to repeat a year and is often bullied by his classmates. Despite the teasing, he has a secret that causes rumors to spread among the students: he is known for having an unusually large physical endowment. As word gets around, many of the girls at school start showing interest in him. Realizing the power this gives him, Chi-soo decides to get back at the boys who bullied him by pursuing relationships with their girlfriends, turning the tables on his tormentors.