In a post-apocalyptic world overrun with mutated beasts called Limbeekoon or Filth Monsters, humanity is forced to live in large mobile cities called Regios and learn to use special weapons called Dite, by harnessing the power of Kei to defend themselves. In the Academy City of Zuellni, Layfon Alseif is hoping to start a new life and forget his past. However, his past has caught the attention of Karian Loss, the manipulative Student Council President and Nina Antalk, a Military Arts student and Captain of the 17th Military Arts Platoon, who instantly recognizes his abilities and decides he’s the perfect candidate to join her group. However, with a secret past that won’t leave him alone and unknown powers beyond normal, Layfon just might not take it.

Feeling slighted by Rin, Kuro goes on the hunt for a new master, but can he find anyone who can truly replace Rin?

In the dangerous suburbs of Chicago, skilled bounty hunters Irene "Rally" Vincent and "Minnie" May Hopkins run Gunsmith Cats, a firearms store of questionable legality. One day, Bill Collins, an agent for the Chicago branch of the Bureau of Alcohol, Tobacco, Firearms, and Explosives, blackmails Rally and May into working with him on a case. The stakes are high, but Rally’s gunmanship and May’s knowledge of explosives are unmatched. As Rally and May unravel the secrets of the case, the two will need to use guns and grenades while being faster, stronger, and better than everyone else in order to stay alive. [Written by MAL Rewrite]

In the far future, the human race advanced to space, and prospered. However, Jikushin ( earthquake of time and space ) which occurred suddenly intercepted all networks, and all the civilizations were reset. However, the human race begins to revive, and enters the prosperity age of The Second by the Transvaal imperial country which rises at the center of the galactic system. The science and technology before the civilization was reset, that is, "Lost Technology" was considered to be god`s task. And, it came to be worshiped by the priest who was called "Tsuki no miko". On the other hand, a certain guard fleet was stationed in the frontier of the galactic system. Though it was the seemingly perfectly ordinary army, the team composed only of the woman called "Angel Corps" existed in this army. They controlled the spaceship which was called "Angel Frame" which was the relic of Lost Technology. And, they collected the lost technology by using the angel frame, and carried out the duties to manage them. They were not the elite pilots, but Angel Corps was rather an eccentric person`s group. Arms mania`s Forte, costume player`s Mint, taciturn Vanilla, showy Ranpha and Milfeulle who likes cooking ... Every time, they cause a big trouble in the mission. (Source: AniDB)