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.
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This list will include short BL stories
Manhwa is the general Korean term for comics & print cartoons.
Manhua are Chinese comics produced in China,Hong Kong &Taiwan.
Webtoons (Hangul: 웹툰) are a type of digital comic that originated in South Korea
Also includes travel bl stories -
ShorT BL's 2░[]░
https://www.mangago.me/home/mangalist/2752120/
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