Cocoon Phase Illusion Orchestra Vol. 01 - Diego on the Horizon
Here is Cocoon Phase Illusion Orchestra Vol.01 - Diego on the Horizon.
The concept of this series is "a musical that concludes in just one song." It features the unique world of the TRUMP Series and the stories derived from its performances, woven into song.
A lot of special thanks to Ayuka for the original translations this was based from.
You can watch it through from NekoCap here.