Responses

It's a BL Korean novel, called If you don't become the main character, you'll die:
https://www.novelupdates.com/series/if-you-dont-become-the-main-character-youll-die/
MC has selective amnesia, he doesn't know how he died, why he's in this world or who he is to a certain extent. But he does have basic knowledge. It's a very good use of first person native too, it took me like 25 chapters in before I realized I don't even know MCs name.... (There's a very well explained reason for this).
Ngl I normally hate amnesia plots, but series like these are why I can't say I 100% hate anything because when done good, it's hella good. I'm now reading two amnesia plots both kinda similar in vibe. And I think it works because both have a legitimate reason there is amnesia, and a good chunk of mystery because we don't know why yet. I'm camping this one!