Responses
Roses and Champagne
https://www.mangago.me/read-manga/roses_and_champagne/
After Killing You
https://www.mangago.me/read-manga/after_killing_you/
I think The Icy Hero is Yearning for Love, Scum villain self saving system, Me and my Husband live in the same coffin, and Grandmaster of demonic cultivation (all novels) fit the bill.
BL where one of them actually dies for a while or pretends to do so (novel,manga or manhwa im fine with anything)