OVA bundled with the Accel World simulation and action games. The Blu-ray OVA discs came with the PS3 limited edition versions and the DVD with the PSP limited edition versions.
The project was split into two PSP and PS3 titles, and one episode was released with each game:
#EX01: Reverberation;Zankyou (bundled with Stage:01 Ginyoku no Kakusei)
#EX02: Vacation;Onsen (bundled with Stage:02 Kasoku no Chouten)