“Butterfly” is the 5th dance practice from the BTS vault to celebrate FESTA 2022. The song was released on November 30, 2015, and appears as the third track for their fourth mini-album The Most Beautiful Moment in Life Pt.2 and as the fourth track of the CD 2 in their first compilation album The Most Beautiful Moment in Life: Young Forever.

A prologue mix and an alternative mix were released on May 2, 2016, serves as the eleventh track of the CD 1 and the fifth track of the CD 2 in their first compilation album.The song has a Japanese version featured in their sixth Japanese single “Run” and in their second Japanese studio album Youth.