Tomizawa Hitoshi manga
Baseball, girls, gags, and one big idiot, that's Mr Fullswing for you. The new generation of Sports/Gag manga has been born with the release of this insane series, so what are you waiting for, get to reading! The main character, Saruno Amakuni, is a loser at attracting girls, perverted, easy to get into trouble, but has great strength of heart and body. He is accompanied by Kengo Sawamatsu, which work together to fulfill Saruno's dream: dating Nagi Torii, Junishi baseball team manager. To do so, he enters Junishi baseball club, only to find many obstacles, new friends and rivals, awaiting him there. And he is total amateur at baseball. Saruno, however, determined to win Nagi's heart, and with Kengo's help, joined Junishi baseball team and struggles to find someplace and fame for himself, and for winning Nagi. From Wikipedia, the free encyclopedia
Is the story about an Otaku that turns out to be the leader of a bunch of delinquents, but he's hiding his true self. His goal, get a girlfriend like his Anime characters.