the demon vore one is MADK
sounds real messed up, but this might be it
http://www.mangago.zone/read-manga/dear_door/
Is it like the one where he wishes to eat the demons guts, or that one where the demon grows this long tail and bat like wings and eats the hearts of his victims after having sex with them.
U kno what, theres too many hahah
It's that one! Thank you so much!!
I'm looking for a polyromantic yaoi
and also a completely different specific manga about a guy who had a weird fetish of eating people while having sex or something? He summons a demon and like they can't say the full name if their level is higher and all so just say the first letter idk please help meh