Responses
https://www.mangago.me/read-manga/daraku_kazoku_ron/
kind of ig? they have the same ex and the mcs girl "cheated" on him with the ml but yeah give it a shot
https://www.mangago.me/read-manga/nande_koigataki_ga_ki_ni_nannen/
https://www.mangago.me/read-manga/bad_contact/ (not actually, but still v good)
recommendations for a bl where they are fighting over a girl/guy but fall in love with each other instead