"飛ぶ教室" (Flying Classroom) is Plutonius' second full album, consisting of 16 tracks, both new and re-mastered. The album was first distributed at VOCALOID FESTA 03 and later distributed at VOCALOID Fantasia 2. Most of the songs are part of Plutonius' Girls Series.
The crossfade can be heard on Nico Nico Douga
The album is available to purchase here.