Dong-hyun, Seok-gu, Sang-min and Young-je are typical adolescent high school boys deeply curious about sexual matters. When a female apprentice teacher, Ms. Kim Yoo-ri begins teaching at their all boys school, she captures the lust and imagination of four of her students, who cannot stop fantasizing about her. Dong-hyuns secret 'love' for his teacher is shattered by news of her affections for another teacher Mr Gong. Yoo-ri has already fallen for the homeroom teacher, Mr Gong, and has her own daydreams about what it would be like with him. Unfortunately, Mr Gong has forsaken love in his life, and is immune to her come-ons. Yoo-ri must get him to accept her advances, while rejecting the rapid-fire advance of her four students.

17 year-olds Sung-eun, and Mi-sook are always curious about sexual matters that nobody teaches them about. One day, new teacher Bong-gu, a handsome and well bred stud,arrives at school and begins to teach their class. He becomes an object to watch and study. Bong-gu, although he seems fine on the outside, suffers from an unknown illness that makes him fart whenever he feels aroused. Three girls learn about this and they go on a mission to make him fart.