
Furious, Joon-soo beats up Ki-seok and tells him to take Woo-ram back. Ki-seok tells Joon-soo that he himself is the father of Woo-ram.

When Woo-ram is admitted to the hospital, Joon-soo becomes depressed and meets up Ki-seok. Joon-soo's parents acknowledge their love for their son and tell Joon-soo that they will help take care of Woo-ram. After days of becoming financially broke and sinking to the bottom, his parents come back home when Joon-soo has an emotional breakdown and expresses his sympathy and love for the baby a love that changed him from troublemaker to a caring father. Finally, he is suspended from school due to the baby being a disturbance. Without anyone to help him, other than Kim Byul ( Song Ha-yoon), a smart girl who has a crush on him, Joon-soo resorts to bringing the baby to school and his part-time jobs. Joon-soo finds himself stuck with the child, he tries abandoning Woo-ram multiple times, but always fails. The baby's name is revealed to be Han Woo-ram ( Moon Mason). The note claims the high school senior, Han Joon-soo, is the father of the baby and the mother could not take care of him anymore. While buying alcohol at a grocery store, a baby with a note is left in his cart. Shrugging it off, he decides to just throw a small party with his friends, Ki-seok (Ko Gyoo-pil) and Choon-seung (Choi Jae-hwan), in his empty house. One day his parents are sick of his bad behavior and run away from home, leaving only a videotape and $100, stating they would come back when Joon-soo got his act together. He always quarrels with his parents and does not obey them.

A high school student, Han Joon-soo ( Jang Keun-suk), is a troublemaker.
