This story is a prequel to Beloved

Fluttershy, a shy pegasus, has been having nightmares about a certain draconequus named Discord, the spirit of chaos and disharmony. Soon, Fluttershy's nightmares become a reality when Discord is released from his stone prison. When the elements are destroyed, Fluttershy and her friends find an alternative: they can 'contain Discord', so that he cannot wreak havoc on all of Equestria. But--maybe, just maybe--the little yellow pegasus can become friends with this havoc-wreaking monster... or, perhaps, they can become much more than that.
Inspirations:
"Bride of Discord" by DisneyFanatic2364
Beauty and the Beast
Fluttercord fanfictions
Keep Calm and Flutter On
Warning: Fluttercord!