- Optimist Park【 10 songs in total 】
- Sorted by ＞ Sorted by album (Time) Sorted by song name (Characters) Sorted by other
- Song Lyricist Composer Date
- 1 8(Provided) 2011
- 2 Blue(Provided) 2011
- 3 Cosmic·rainbow·heaven 2011
- 4 Gravity Wells(Provided) 2011
- 5 Imaginary Friends(Provided) 2011
- 6 Love It Temporary(Provided) 2011
- 7 Our Radioactivity(Provided) 2011
- 8 The Dust Bowl(Provided) 2011
- 9 The Fragility Of It All(Provided) 2011
- 10 /cosmosis(Provided) 2011