Dong-hyun, Seok-gu, Sang-min and Young-je are typical adolescent high school boys deeply curious about sexual matters. When a female trainee teacher, Ms. Kim Yoo-ri (Kim Seon-a) begins teaching at their all boys' school, she captures the lust and imagination of four of her students, who cannot stop fantasizing about her... If you saw Who slept with her you know the genre Watch drama online for free.