I lost a yaoi I planned to read cuz I really likes the art style aaa It's about a black h...

I lost a yaoi I planned to read cuz I really likes the art style aaa

It's about a black haired guy who summoned a demon because he wanted to eat him, then after it was all done the demon took his head and brought him in the demon's world. I think the demon's called J, it's cuz they can't say their entire name or else they get cursed idk.
I remember at some point, the guy got his head attached to a dog's body,,,

if you know It by any chance help me pleaseee（/TДT)/