i don’t remember the title

I read this bl manga before where the ml is lowk rlly obsessed w this character from a book and whenever he dates someone, he makes them say “__ is dead”. Then one day, he sees a boy who’s literally that character from the book (but male ver). There’s a nice plot twist and the manga had only 5 chaps. I remember the whole story tbh, I’m just bad at remembering titles. Can anyone help my find it?