``Suddenly extracurricular class!'' Four pairs of school students in a forbidden relationship challenge themselves to health and physical education bingo for the prize money!Student council president x secretary, childhood friend, senior and junior in the volleyball club, friend's girlfriend...An immoral health and physical education class where four groups with various relationships collapse every bingo square!"What should I do...", "Don't look...", "It's not good after all...", hesitating, but gradually it progresses to sex!Starting tomorrow, every time we meet in school, the memory of that closed room will flash back and my crotch will tingle! A forbidden traumatic extracurricular lesson!
