kensei

Ten years ago, an inscrutable and abnormal territory known as Hell's Gate appeared in Tokyo, altering the sky and wreaking havoc on the landscape. The heavenly bodies disappeared, replaced by false stars.

Set on the fictional year of 2010, the world has been split into 3 superpowers: The Holy Britannian Empire (the Americas; also called Britannia), the Chinese Federation (Asia), and the European Union (Europe and Africa; previously known as the Euro-Universe. Also known as Europa United in Akito the Exiled).

Hei and Yin are now on the run after betraying the Syndicate in the previous season. After leaving Japan, Hei encounters Suou Pavlichenko, a 13-year-old Eurasian girl who becomes embroiled in the war and politics of the various factions and Contractors vying for power.

The story centers around Ryuta Sakamoto, a NEET (Not in Education, Employment, or Training) young man and a top-ranked player in the online combat game Btoom! One day, he wakes up on a tropical island without remembering how he got there.

By its eleventh expansion pack, the massively multiplayer online role-playing game (MMORPG) Elder Tale has become a global success, having a following of millions of players. However, during the release of its twelfth expansion pack: Novasphere Pioneers, thirty thousand Japanese gamers who are all logged on at the time of the update, suddenly find themselves transported inside the game world and donning their in-game avatars.

In the year 2021, mankind was defeated by Gastrea, a parasitical virus, and is forced to live within a wall made of Varanium Monoliths, a metal that is able to subdue Gastrea. Soon, the "Cursed Children", children born with the Gastrea virus who are able to control it—which gives them superhuman abilities—were discovered.

It’s been one year since the failure of the Black Rebellion and the supposed death of Zero. Britannia has assigned Area 11 a “correctional education” status, where Elevens are made an example of by brute force, to try to prevent any future uprisings and suppress rebellious thoughts.