Mackerel Run (2007)

Cha Gong-chan was able to enter the top private high school in the affluent Gangnam District, Myoung-mun High, because of his soccer skills. But when he quits the sport, he finds himself an outcast and starts cutting class. One day, a beautiful new girl transfers to the school, and when she walks into his class, Gong-chan falls for her instantly. He is finally enthusiastic about going to school, but the school administrator informs him that he will be expelled if he misses one more day. Gong-chan vows that he won't give up on either his school life or his love.