I think it was based off al already existing anime, but i’m not so sure. All i can remember is someone was kidnapped to be fed to a monster and it was half man/snake and he didn’t eat him and they fell in love?? The snake man had long hair and i think tattoos but my memory is hazy. Anything helps!
its yaoi
http://www.mangago.me/read-manga/mauri_to_ryuu/
I think the first story is what you are searching for
ah i’m sorry that’s not it either
I think it was a Doujinshi? maybe but the characters were from gintama or bleach? I cant really remember. But this guy got kidnapped to feed a snake/human but he lived and he protected him. I’m pretty sure it was yaoi. Anything helps （￣へ￣）