He's the only son of a mother who runs a hair salon while also being the "best fighter" of Moonduk High School. His name's Joong-pil, and his days are really tough. But the most important part of his day is going to school. Firstly, to meet the expectations of his followers and to frequently make his presence known, he has to fight other groups trying to take over his position. And under Joong-pil's protection and threats, he maintains a peaceful relationship with Dan-gun's gang, who holds the number two spot at school. But one day, Cupid's arrow unexpectedly strikes Joong-pil's heart who before had nothing to worry about and fear. It's Min-hee, the prettiest girl of the neighborhood girls high school, Jeonglan. But not long before his pink puppy love starts, his cozy life becomes threatened by a newcomer...