Help please

Does anyone know what all mangas ~Saph~ has translated? I read a manga about demons and humans coexisting. It was in a high school setting and they were separated by the size of their horns. Long story short a human who is pretending to be a short horn demon found a long horn demon who was sick and took him to the infirmary room. Despite being out of it the demkm more or less figured that the guys was human and every chance he gets he eats (have sex) with the human. I can't remember the name of the manga though.