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In order to thank the honest and kindhearted girl, Subaru offers to help in her search, and later that night, he even finds the whereabouts of that which she seeks. Fortunately, a mysterious beauty named Satella, in hot pursuit after the one who stole her insignia, happens upon Subaru and saves him. Armed with only a bag of groceries and a now useless cell phone, he is quickly beaten to a pulp. Things aren't looking good for the bewildered teenager however, not long after his arrival, he is attacked by some thugs. When Subaru Natsuki leaves the convenience store, the last thing he expects is to be wrenched from his everyday life and dropped into a fantasy world. He has been avoiding making trouble for others but his life changes when he meets a girl Yuzuriha Inori, a member of a resistance guerrilla group called “Undertaker”, whose members pilot mecha weapons to fight against the government. He can use the power “Ability of King” to extract tools or weapons from his friends. Ohma Shu is a 17 year old boy who has a psychic power in his right hand. After the outbreak of the unidentified virus “Lost Christmas” in 2029, Japan has been under the control of a multi-nation organization called GHQ. Shuu gets dragged into the conflict the moment he rescues Inori, and the Void Genome shatters in his hand, granting him the "Power of the Kings." While learning how to control his grand new ability, Shuu must now fight to liberate Japan from its cruel oppressors. Having nowhere to go, she seeks refuge in a warehouse where she meets Shuu Ouma-a socially awkward high school student who is a huge fan of her music. The vial falls into the hands of internet vocalist Inori Yuzuriha, who ends up being hunted by the GHQ's Anti-Bodies forces. Led by the charismatic Gai Tsutsugami, the group plots to steal a vial containing the "Void Genome" to further their goals. Frustrated with the state of the nation, a resistance group named the Funeral Parlor aims to liberate Japan from the GHQ.
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A decade later, the country still lives under their control, unable to break free from their draconian rule. In an effort to establish order, the United Nations sends the GHQ to assist with the crisis by containing the outbreak while removing all political autonomy in the process. On December 24, 2029-the day colloquially known as the "Lost Christmas"-the Apocalypse Virus spread across Japan, bringing death to its citizens and plunging the country into utter chaos.
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