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/

found it! not a caretaker for demon but the king of hell ╥﹏╥ https://www.mangago.zone/read-manga/jigoku_meguri/

found it! not a caretaker for demon but the king of hell ╥﹏╥ https://www.mangago.zone/read-manga/jigoku_meguri/

found it! not a caretaker for demon but the king of hell ╥﹏╥ https://www.mangago.zone/read-manga/jigoku_meguri/