ARP: A 4-member dance and vocal group created by the latest AR technology.

This popular group got their start with Avex, and are unique for their interactive concerts which combine highly-skilled song and dance routines with a format that changes based on how much the fans are cheering them on. And now, you can follow their rise to glory in the new anime, ARP Backstage Pass!

[Source: Crunchyroll]

Unaired episode included with the fourth Blu-ray/DVD volume.