I once read a hentai comic about this boy with premature ejaculation who has a crush on this girl. So he enters her school club and finds out the club president is fucking all the girls in the club, and the only way to stop him from fucking the girl he likes, is if the main guy takes his place as club president. In order to do this, he must fuck all the girls in the club without cumming. But since he has premature ejaculation, he's unable to. That is, until he meets an angelic winged female penis that improves his stamina, giving him the power he needs to take over the club.
Now I've been searching for years to try and find this fucking masterpiece again but I haven't been able to find it, I'd really appreciate any help on the matter.