I find it a bit irritating that out MC doesnt really act like a demon at all? Ive only gotten to about chapter six so far, but he is worrying about how he looks to these random highschool dudes, and is worrying about their relationship, when he has never really even talked to a human before this (assumedly, since he was so suprised about going to the human world). In the first chapter, he acts like he views humans as stupid creatures that deserve to be below him, and then never once views them like that again. The character for this guy feels all over the place, but im staying here because I like the FMC, so hopefully this plot becomes a little bit more organized.
It really feels like the author just said "eh screw it" to the whole plot where the MC is a demon, and just made him normal high school MC number 5590 because they got lazy.