It started with a musical dance performed by the three students and the hot teacher (Her name is Kim Sa-Rang btw. and not Seong someone like this other person from Sofia wrote. . All these weird combination, namely the hot teacher, playboy student, old-looking student with a big penis, pervert delinquent student, and the mean math teacher/discpliner lead to a really really funny movie. I couldn't stop laughing at all the weird things they did. This is definitely a must see!!!