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.
-Reincarnation, Transmigration
-Reincarnated in Another World
-Reincarnated in a Game World
-Reincarnated in a Book World
-Reincarnated as the Villainess/Villain
-Reincarnated as a Side/Mob Character
-Reincarnated in The Past/Future
-Time Travel, Time Rewind, Regression
-Transported to Another World
-Female Protagonist
PART 3:https://www.mangago.me/home/mangalist/682647/
PART 4:https://www.mangago.me/home/mangalist/1494844/
PART 6:https://www.mangago.me/home/mangalist/3193687/
Typical "Cinderella" story. This list is about :
Seme : Handsome, Popular, Rich, Big Boss, Noble, Emperor etc
×
Uke : Poor, Ugly, Plain, Unpopular, Unnoble, Servant, Ordinary, etc
I'll use MC/ML for shounen-ai
Page Information :
》Idol/Popular seme x Ordinary/Unpopular/Ugly Uke (pg 1-6)
》Master/Big Boss/the President/etc Seme x Servant/Underlings/Employee/etc Uke (pg 6-8)
》Rich Seme x Poor Uke (pg 8-10)
》Emperor/Prince/Noble/etc Seme x Unnoble/Ordinary/etc Uke (pg 10-12)
■ including the raws