Could it be this series? Similar to what you're describing.
http://www.mangago.me/read-manga/naruto_special/
Could it be this series? Similar to what you're describing.
http://www.mangago.me/read-manga/naruto_special/
Specifically Concrete Garden. http://www.mangago.me/read-manga/concrete_garden/
It was Concrete Garden, thank you!
Yup! I recognized it right away! It's a personal favorite.
Do you know any other similar mangas? :D
I don't, bug this is from Baka-updates. https://www.mangaupdates.com/series.html?id=1974
Im looking for a manga where seme was an angel/monster and a young boy got a job at this lab where the seme was held. Ukes job was to keep the seme acompany, later he got to know that for the seme, humans are food.