Accel World EX
Japanese title: アクセル・ワールド EX
Alternative titles: Accel World OVA, Accel World: Reverberation, Accel World: Ginyoku no Kakusei, Accel World: Kasoku no Chouten
Type: OVA
Source: Light novel
Episodes: 2
Status: Finished Airing
Aired: Sep 13, 2012 to Jan 31, 2013
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Sunrise
Licensors: VIZ Media
Genres: Action, Romance, Sci-Fi
Themes: School, Video Game

Reverberation
A mysterious avatar has hijacked the Umesato Junior High Local Network, trapping students and stripping them of their clothes and belongings. After learning that other schools are facing a similar problem, Kuroyukihime gathers Haruyuki Arita and the other members of Nega Nebulus—one of the Seven Great Legions—to solve the mystery.

Vacation
Haruyuki is due for a physical re-examination in two weeks. If he fails, he will not be allowed to participate in any more territory battles with Nega Nebulus. To ensure that their legion does not lose their "Silver Crow," Chiyuri Kurashima takes it upon herself to help Haruyuki get into shape before his examination.

[Written by MAL Rewrite]