Alright, so when I first found it, I was searching for hanahaki fics, bc I was bored and I wanted angst. Basically, it's remus x fem!oc, name-that-probably-starts-with-an-e darlington. She has this thing where if someone falls in love with her, flowers build up in her lungs, which causes her to be incredibly rude to everyone so that nobody likes her and she doesn't die. Lily is her best (and only) friend, mostly out of stubbornness, aka she refused to stop talking to her when she started pushing everyone away. She's a gryffindor and she has a super duper secret crush on remus, which would be fine if he didn't have one on her. In one of the last scenes that I remember, she's waiting for lily near the Slytherin Commons/hang out spot or smth when she gets attacked by two guys who turn out to be death eaters and goes to the hospital wing. Oh, also Sirius is fricking with her the entire time by trying to go on a date with her or smth idek.