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)

The year is 2046. Haruyuki Arita is a young boy who finds himself on the lowest social rungs of his school. Ashamed of his miserable life, Haruyuki can only cope by indulging in virtual games. But that all changes when Kuroyukihime, the most popular girl in school, introduces him to a mysterious program called Brain Burst and a virtual reality called the Accel World. 
(Source: VIZ Media)

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