Tracklist
- 1Butter-Fly4:36
- 2Brave Heart4:11
- 3Butter-Fly (Ballad Ver.)4:55
- 4Butter-fly (우리들의 war game ver.)4:15
- 5Butter-fly (inst.)4:15
- 6Brave heart (inst.)4:11
Release credits
- mix [1-3]
- electric bass guitar [1-3]
- electric guitar [3]
- electric guitar [1-2]
- drums (drum set) [1-3]
- keyboard [1-3]
Issues
- B10 July 2020
- BUSB Flash Drive10 July 2020
- BDigital Media24 June 2022