神様はサウスポーDIAMOND•

Kamisama wa Southpaw: Diamond

Deceived by a desperate coach into a boxing match that he has no business winning, Kaneishi Gou is under the impression that boxing is not as hard as one might think. The promise of easy money whether he wins or not brushes off even more pressure out off his first and last match... until he is knocked out in the first round. (Source: Anilist)