Responses
Haven't read this one but the summary sounds like what you're looking for.
https://www.mangago.me/read-manga/redoing_my_youth_in_another_world_the_god_of_death_is_my_fanboy/
It can be also this?
https://www.mangago.me/read-manga/augs_law/
It's this one thank you!!
No but I found it thank you:)
It's a human that got in a monster school the ml is a grim reaper I think, also if I remember correctly human scent is very alluring to the monsters