In a high school second grade classroom, Bonggu (Gyu Seok) and Genija (Choi Soo-hoon), whose grades are low, love each other (Yi Yeon Yeon) and Niho teacher. The hard - luck Changshu helps his mother to clean the liquor, but the Eun - joo, who grew up in a rich environment, screams without understanding him. Eunju is always attracted to the innocence of the pure mind while maintaining good grades and suffering obsession with the grades due to the obsession of the parents. She takes her parents' cold eyes when she is pushed to the seventh place by the next exam. Eunju can not endure it and suicide. In the classroom, a flower is placed on the desk of Eun-joo, and the hearse and the children are tears as the hearse runs the school.

Jun-hyoung is a training teacher who meets Hye-na, a very outgoing student. She always acts freely with out any restriction. As time as goes by, she slowly starts to interfere in his life. Sun-shul, who is very lonely, loves Hye-na. Jun-hyoung feels that it's hard to put up with Hye-na, but his mentor insists and tells him to take care of her. Jun-hyoung does not understand and feels as though this situation in unfair for him. Soon after, he finds out Hye-na's secret...