Any straight recs where the ml regrets hurting the fl or doing something to her? (No rape ...

fiery enemies

This one. FL is actually so miserable i cried every chapter.

https://www.mangago.zone/read-manga/my_beloved_oppressor/

The regret arc takes time btw. And she hurts her a lot..

https://www.mangago.zone/read-manga/what_it_means_to_be_you/
https://www.mangago.zone/read-manga/how_to_hide_the_emperor_s_child/

Thank u guys<3

Ah yess but I'm already reading it. Thx anyway, the angst in it is so painful I love it