Yusi High School is an ordinary high school with little hope of entering a university. As a freshman, Sang-ho meets his old friends Jae-gu and Chang-ber here. They like to wander around when they have nothing to do. Like many children in puberty, they are also full of curiosity about the outside world. Sang-ho's dream is to become a model student and he is working hard for it. Apart from studying, he cares most about sharing happy times with his friends. They, along with their new friend Kyung-chul, Sang-seok, and Hong-gyu from the same school, formed the Tiger Club. The purpose is only one: to play football and release their excessive energy through playing football. Besides studying and playing football, they seem to have nothing else.