YES THERE IS
U know the name?
there is actually 4-5 stories i remember with similar plot
https://www.mangago.me/read-manga/hatarake_inma_kun_koya_mo_ecchi_na_gohoushi_shimasu/
https://www.mangago.me/read-manga/hetakuso_inma_ja_dame_desu_ka/
but i think the one you are taking about might be in my list with twink incubus lol
The one I read was the incubus wanted to become a devil, long horns and wings I guess. But when he gets into relationship with a human he lost his incubus power and ll ater after few chapters he became an angel. It has a nice art
Wait I think I read a similar story but the start was different.