you probably already read it but https://www.mangago.zone/read-manga/open_board_dreamyzz/
fornm of sympathy
egoism
Happens to be a fave trope of mine:
https://www.mangago.zone/read-manga/ghost_window/
https://www.mangago.zone/read-manga/to_me_who_doesn_t_love_you_team_hazama/
https://www.mangago.zone/read-manga/eat_me_up_my_husband/
https://www.mangago.zone/read-manga/master_x_secretary/
https://www.mangago.zone/read-manga/hunting_game_1/
https://www.mangago.zone/read-manga/my_hyung_s_lover/ (tw psych&violence, has happy ending)
https://www.mangago.zone/read-manga/amaregulus_soldier_soother/
recs where uke is older and at some point was apart of semes life while he was a kid or somethin? like took care of him or anything heh