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 Hyun’s secret 'love' for his teacher is shattered by news of her affection 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.