it's a japanese bl, the main character got a job as a caretaker of a demon
This? https://www.mangago.zone/read-manga/new_world_lovetopia/
not this one, but thankyou for replying :)
This maybe? https://www.mangago.zone/read-manga/akuma_ga_kitari_kimi_ni_muchuu/
https://www.mangago.zone/read-manga/oni_no_esa_ja_arimasen/
it's a japanese bl, the main character got a job as a caretaker of a demon