평소 먹는 것을 좋아해 뚱뚱하고 큰 체격을 가진 임세준 그는 뚱보라는 놀림에도 신경 쓰지 않는 자존감이 높고 확고한 성격을 가졌다 그에게 단 한 명의 친구 서하진 그녀는 어릴 적부터 세준을 지켜주기 위해 늘 운동을 배워왔다 어느 날 세준은 같은 반 일진과 트러블이 생기고 그것을 본 하진은 눈이 돌아가 일진을 박살 내게 된다 그런데 어느 날 밤 하진은 심하게 폭행당한 채로 발견되고 크게 다친 무릎과 더 심각한 정신적 후유증을 얻는다 세준은 경찰에게 말해보
Lim Sejun, who likes to eat, is fat and has a large physique. He has high self-esteem and a firm personality that doesn’t even care about being teased for being fat. He has only one friend, ‘Seo Hajin’. She has always been learning Jiujitsu to protect Sejun since childhood. One day, Sejun has trouble with a delinquent in the same class, and Hajin sees it and destroys that delinquent. But one night, Hajin is found severely beaten and suffers from a badly injured knee and more serious psychological trauma. Sejun tries to tell the police, but when the investigation doesn’t make much progress, he can’t control his anger and goes to find the culprit himself, but he’s defeated by the delinquent who learned Jiujitsu and finds nothing. Then he learns Jiujitsu from a man named ‘Jason’ who saved him. Three months later, Sejun, who learned Jiujitsu and lost weight, finds out that a veiled group is involved, and wants to destroy it. A school action drama depicting individual revenge.