hahah same ╥﹏╥
here are some more recs w/ regret (not necessarily losing one person, but definitely allata angst)
1. on or off
2. backlight
3. struggle (major themes of regret and cold shouldering)
4. painter behind the curtain (again, a SHIT tonna regret)
5. ways of parting
6. don't want to see you in the next life
7. a shoulder to cry on (so good)
8. hate mate (seme loses the uke to another guy #majorregret)
9. an unsettling scent (seme and uke get together, but it's the uke who goes through the arc of regret)

Manga/Manhwa/Manhua all are okay.
I'm looking for a specific trope where there seme mistreats the uke and regrets, grovels, and all that but is too late because either the Uke is dead or is with a new Seme.
Thank you!