yon's manga / #straight(83)

pretty much pwp with a ridiculous premise - a gym where the members work out through sex. the main character is a judo-ka who's been out of the game for a few years and has let himself go in the meantime. he finds this gym and starts working out, and finds out that his dick is so huge and magical that all the women who sleep with him want to keep sleeping with him... but he's got his sights set on the trainer. ultimately ends in a happy ending between him and the girl he has a crush on :)