Responses
There is a story similar to what you’re describing called anglerfish, and the cover does have a red scarf. maybe that’s it?
OMFG IT IS. THANK YOU IM NOT DELULU
there is another story with a similar concept:
https://www.mangago.zone/read-manga/a_mail_from_my_dead_lover/
this one has the MC get possessed by his boyfriend who died and then a whole lotta shit happens throughout the story. it's pretty good and the MC and ML are both really hot.
I remember read something similar like years ago. I think it mention ghost, or death by the river and some mystery behind it. idk I only read like the first chap. What i remember for sure is one of them wear red scarf and also have more ominous vibe than this one... Does it really exist or am i delulu