There was a fic I read years ago about a girl who wins a contest for a day with EXO maybe? It's a group thing and it's well known that the contest is mostly for getting girls who want to sleep with the band, but she doesn't really and she's very quiet and like spends most of the time away from the group? I've been trying to find it for soooo long and it's bothering me lol. It's rated M, I think.