Hamada Katsuo is your everyday pervert loser. He's starting a new semester in school, so he wants to escape from his loser days, the only problem is the new change in look/lifestyle he got is that of a gang member. He beats a strong guy who was bullying a friend of his by mistake and now, because of it, he's the target of all the gangs in the region, even though he's still only a weakling and a pervert. Will Katsuo escape alive?