Two boys in love since high school or childhood but one of them gets married. Later divorces and comes back to the other man.
Like 40 x 40 Chikuwa Kaigi
https://www.mangago.zone/read-manga/life_senjou_no_bokura/
Already read it ಥ‿ಥ
Here - https://www.mangago.zone/read-manga/mukuwarenai_koi_no_uranaikata/ https://www.mangago.zone/read-manga/aibou_no_jouken/ https://www.mangago.zone/read-manga/ano_hi_no_kiss_wo_mou_ichido/4th chapter story - https://www.mangago.zone/read-manga/limiter/
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?
https://www.mangago.zone/read-manga/it_can_t_be_mutual_love/
Thank y'all
Two boys in love since high school or childhood but one of them gets married. Later divorces and comes back to the other man.