Story
The characters receive an email from Ovan requesting them to go to Δ Hidden Forbidden Festival where a mysterious summer festival is set up. There they encounter an AIDA Chim Chim who wishes to peacefully co-exist with the players of The World. It then transforms into the word "Returner", which Haseo assumes it to mean that Ovan will return to The World.
Where to watch in India
.hack//G.U. Returner is not on a streaming service in India that we know of.
Availability can change. Check the service before you plan your evening.
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