Kim Chang-bae
Sang-ho is an ordinary high school student. His dream is to enter the military academy under the influence of his father who is an army colonel. As entering high school, he became friends with Jae-gu, Chang-bae, Kyung-chul, Hong-kyu and Sang-sik. They grouped a soccer team called 'Tiger', building up friendship by playing soccer. Sang-ho and his friends ran into group of fight with seniors, these incidents made everybody in school to misunderstand them as they were serious group of gangster. When Sang-ho gets becomes close with a girl whose boyfriend is a boss of another school's gangster group, things are going worse.
Young Jung-woo
Thirty year-old teacher In-young falls in love with her own student, Suk. What attracted her to the boy was the fact that he resembled her first love in every way, and even shared the same name. But with the sudden return of her long-lost love, and the appearance of a cute high school girl who confesses her love towards the boy Suk, In-young finds herself lost among the two first loves.
