.hack//G.U. Returner
Genres: Adventure, Drama, Fantasy
Type: OVA, Episodes: 1
Aired: Jan 18, 2007
Studio: Bee Train
Source: Game
Rating: PG-13 - Teens 13 or older
Synopsis:
The characters from previous .hack//G.U. Games and .hack//Roots receive an email from Ovan. He is requesting them to go to Hidden Forbidden Festival where is set up a mysterious summer festival. 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)