Plot
Grades are so-so, having fun is so-so, and fighting with others is also so-so. Nothing is so special about middle school student Dong-hyeon. However, this guy has a fear. The penis that has been used only for urination (as he thought of) has become strange. Whenever he looks at Penthouse, a ladies room sign, a hygienic band advertisement, or even a Coke bottle, he becomes erected, his heart starts pounding hard and he has a wet dream that night. Dong-hyeon shares his experience with his friends Seok-gu, Sang-min, Yeong-jae, and Cheon-su, and gets to know that they are experiencing the same thing. Dong-hyeon and his mates concentrate on sex-related things and get familiar with know-how of dealing with their sexual desires. On one day, a beautiful and sexy university senior Yu-ri comes as a temporary teacher accumulating her teaching experience. From now on, the target of Dong-hyeon and his mates' sexual desire changes from some anonymous girls to the newcomer: Yu-ri. Dong-hyeon and his mates make a plan to pet Yu-ri's sexy body with all kinds of strange ideas. Finally, they go on a bet each other that the one who sleeps with Yu-ri will get all the support from other mates. The mates have now become enemies and compete with each other. However, they come to face a huge enemy, their teacher who is notorious for dirty behavior and named as Terius: Byeong-cheol. Formerly, he was the teacher of Yu-ri and was the first love of her when she was at a high school. Moreover, she still l
