Haseo and the other members of the former Twilight Brigade receive an email from Ovan inviting them to go to the Hidden Forbidden Festival where a mysterious summer festival is set up. There they find an AIDA Chim Chim who wishes to peacefully co-exist with the other players of The World. It then transforms into the word "Returner", so they assume it to mean that Ovan will return to The World.

Source: ANN

Note: This is a single-episode OVA offered to fans who completed all three GU Games, featuring characters from the .hack//G.U. Games and .hack//Roots.

AniDB | ANN | MAL | TVDB

Prequel: .hack//G.U. Trilogy