It’s a BL, Korean manhwa, college life, straight top. The top is a sunbae and blonde. It starts out unrequited and then reciprocated. I think the bottom was rejected the first time he confessed. There’s probably a couple titles like this but I don’t think it was more than 40 chapters and the title pages had post it notes of the characters doodling
He’s probably not afraid of dying cuz he’s not bound to that body since it’s not originally his and thinks he can follow the MC in a new one