Regretful male leads in Shoujo/Josei (which can also be 2nd MLs).
SIMILAR LISTS:
Regretful semes (BL)
:
https://www.mangago.me/home/mangalist/2671292/Regretful semes that DON'T actually get forgiven at the end
:
https://www.mangago.me/home/mangalist/3265321/ 
