When seme (or male lead if it's shoujo/josei manga) regretting all the bad thing he has done (especially to his significant other) and trying to make amend of his wrongdoings. Some of the list has uke that is very forgiving, never forgive or died. I don't mind whichever ending, it's just the feeling of regret, from doing bad things or taking things for granted.
Most in the list are yaoi/shounen-ai genre, that's why I used term 'seme'. Feel free to add if you have anything similar in mind.
List of Yaoi where Seme used to be players but have seen the light
after meeting uke…and maybe become a lil…simpyyyyyyy
All these mangas have situations where seme acts too
arrogantly, cruel, nasty or misunderstands uke and this leads
to their ukes leaving,rejecting or hating them. These are yaoi that
revolves around semes who realises they were
ASSHOLES, they deal with the CONSEQUENCES…
….
and their
rEGRET!
#Satisfying stories only
Regret Masterlist Part 2: https://www.mangago.me/home/mangalist/2778544/
