
Two boys in love since high school or childhood but one of them gets married. Later divorces and comes back to the other man.

https://www.mangago.zone/read-manga/papa_no_sukinahito/
https://www.mangago.zone/read-manga/kazoku_gokko_kikuya_kikuko/
May not be exactly what you look for but close enough?

I have severe allergy to happiness

https://www.mangago.zone/read-manga/obey_me/ yeahhhh...I've got something for you
Soft and comedy
Devil's temptation