- Hidden History【 9 songs in total 】
- Sorted by ＞ Sorted by album (Time) Sorted by song name (Characters) Sorted by other
- Song Lyricist Composer Date
- 1 Black & Blue
- 2 Callous Heart
- 3 Cold of Apathy
- 4 Down
- 5 Goodbye
- 6 Hold On
- 7 Mirror
- 8 Paradise
- 9 Stalemate