I found the one.. or ones? an AJR fanfic (x reader)

(y/n) was just walking to an abandoned band room, when they heard the most beautiful singing. It was three brothers, little did they know, they would catch feelings.
- i am referring to the reader as they (because i dont like to deal with the reader as automatically female -_-) so the reader is neither
- when i say "abandoned band room" thats where i think the hallelujah cover was filmed and thats where they meet