While playing the newly released MMORPG The World, Minase Mai and Tomonari Kasumi collapse in the real world and are sent to the hospital after hearing a mysterious sound. Only Mai recovers, while her friend Kasumi slips into a mysterious coma. Mai is later approached by the creator of The World, Tokuoka Junichiro, who unveils to her that, just like her friend, six other players across the country also collapsed while playing The World and are now in mysterious comas. What exactly is The World, what is this mysterious sound Mai keeps on hearing, and why are people slipping into comas from this game? Minase, Junichiro, and their acquaintances set off to get to the bottom of this problem before any further harm happens.

Japan, 2019, just before the dawn of a new era. Suddenly, a rift to another dimension appears in the sky, revealing an alternative world Shinkoku Nippon, with the sky and the earth upside down. This parallel world keeps their former militarism, with its era being Eternal Showa. The military invades the real Japan with giant humanoid robots called Garann and their gas weapons Genmu, rendering our modern weapons ineffective. Shinkoku Nippon instantly seizes the government and achieves de facto conquest of Japan. The new era, Reiwa, has now arrived for Japan. (Source: MAL News)

Based on the CyberConnect2 HIT GAME, now will be released in a CG Movie! The Movie will be placed in the storyline of each .hack//G.U. games trilogy. The story follows Haseo, a player in the online MMORPG called The World:R2 at first depicted as a PKK (Player Killer Killer) known as the Terror of Death, a former member of the disbanded Twilight Brigade guild. Haseo encounters Azure Kite (believing him to be Tri-Edge and blaming him for what happened to Shino) but is hopelessly outmatched. Azure Kite easily defeats Haseo and Data Drains him, reducing his level from 133 to 1 and leaving him without any items, weapons, or member addresses. He is left with a mystery on his hands as to the nature of the Data Drain and why Azure Kite is in possession of such a skill. Eventually Haseo gains the Avatar of Skeith. Acquiring the ability to call Skeith and wield his abilities, such as Data Drain. With Skeith as his strength, Haseo begins the quest for a way to save Shino. He is seen seeking out a PK (Player Killer) known as Tri-Edge, whose victims supposedly are unable to return to The World after he PKs them. Haseo's friend, Shino, was attacked six months prior to the events of the game by Tri-Edge, and the player herself, Shino Nanao, was left in a coma. (Source: AniDB)

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)