So I remember a fic that I'm pretty sure was on FF.N but not positive, where Blaine sang Welcome to the Black Parade. He sang the song about his father. It might have been a badboy!Blaine fic, but I'm not certain. It was definitely Klaine in pairing though.
Mods: this is my first time posting here, so I probably don't have the tags right, let me know if I need to change them!