Manga by author Hamori Takashi

The protagonist Hamada Katsuo, is your everyday pervert/loser character. 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 that was bullying a friend of his by mistake and now, because of it he's the target for all the gangs in the region, even though he's still only a weakling and a pervert. Will Katsuo escape alive...? Find out.

Noritaka Sawamura is a teenager; until this day, everybody has been making fun of him. Now he enters the high school which is an opportunity for him to restart a new life! He loves a girl of his school, but he needs to be a little bit stronger to be recognized by everybody. So he joins the Thai boxing section. His entertainment is very special, due to his master who seems to be a little mad. Noritaka will make you laugh, for sure!Note:My favorite passage is when Sawamura spins through a window with a helmet, his trousers missing, with crap coming out of his ass, and everybody looking at him. He is the most ridiculous man in the world at this moment!