Naoto is a brilliant amateur mechanic who spends his days tinkering with gears and inventions. And the world is a playground - a massive, intricate machine. But his quiet life is disrupted when a box containing an automaton in the shape of a girl crashes into his home. Could this be an omen of a breakdown in Naoto's delicate clockwork planet? And is this his chance to become a hero?

With the sudden appearance of AnchoR, the “sisters” of the Initial-Y series are reunited, but it may not be a happy meeting! Whatever her intentions, this tense encounter means that underground conspiracies may finally come to light. From learning of hidden weapons and a nefarious plan of destruction, the group may be in for more than they bargained for. This time Naoto and his allies may have to go all the way to the top to find justice.

After Naoto, RyuZU, Marie, and Halter's mission to save Kyoto succeeded, the group must lie low. Branded as terrorists and with Marie presumed dead, the new allies decide to gather more information while acting out the daily lives of high school students-something Marie isn't used to! While undercover, Marie receives valuable information through a coded message: The government is still abusing core parts to endanger civilians. Meanwhile, RyuZU wishes to find her little “sister,” AnchoR, bu...

Naoto and RyuZU have a tense encounter with Marie Bell Breguet and her bodyguard, Vainney Halter, but they form a shaky alliance with the shared goal of fixing the Core Tower in Kyoto. With the city's most important structure in disrepair, Kyoto's entire population is at risk, but Naoto believes he can save it before the city undergoes a Purge. This unstoppable team of renegades may be able to save millions of lives, but acting against government orders may spark a dangerous conflict. Is N...

The conspiracy plot in Tokyo comes to a conclusion, and Naoto and the crew make their way to crime-ridden Shangri-La on a bold new adventure! Though the world is shrouded in constant mystery, Naoto's incredible hearing skills, combined with Marie's genius engineering, will help lead them to the truth beneath the surface.

Even though AnchoR is RyuZU's little sister, her immense power poses a threat to Naoto and the crew. When the two siblings confront each other, an explosive battle ensues that bends time and space! Even RyuZU's Imaginary Time and her unique power, Mute Scream, may not be able to best an automaton built to destroy. Meanwhile, in Akihabara, a massive weapon appears, leaving the city's armed forces at a loss. If Grid Akihabara falls, all of Japan may be in danger. Can Naoto handle a weapon st...

Amid all the conspiracies and plots, the government is forced to come to a stalemate. When threats from mysterious parties and all-powerful weapons seem impossible to overcome, the leader of the military coup starts calling the shots. What's more, the leader's intent behind the coup is more dangerous to humanity than any could have imagined. Japan's national crisis has hit its peak, and Naoto and his friends stand at the core!

Everything seems to come to a standstill when an electromagnetic pulse magnetizes the clockwork the planet depends on. Not only the planet, but the automata, too, are knocked out of sync. The powerfully-built AnchoR is able to return to her senses, but RyuZU remains out of commission while Naoto and the crew plan their next step. Meanwhile, Marie's influence extends far and wide: from the government where a fellow meister gathers information, to the Imperial House, where a princess awaits ...

With her power of foresight, Oriko Mikuni sees at the future of Mitakihara, using Kirika Kure to hunt other magical girls. What does Oriko want with the girls intertwined around Madoka...? Don't miss the long-awaited third volume to the prequel series!

Oriko sees her use of Kiriko as an attack dog against other magical girls as a justifiable means to achieving a greater purpose--protecting the world from the destructive force of Walpurgisnacht. However, their arrangement has piqued the interest of another magical girl, who has her own reasons for wanting a magical killer like Kiriko at her beck and call...Will her savory offer sway Kiriko's allegiance and leave Oriko herself open to attack?!

After becoming a magical girl, Oriko Mikuni befriends other magical girls at her school-and not always on initially positive terms! Complications arise when Oriko's friends, unaware they both know Oriko, fight over a grief seed, leading to someone's death...

Oriko Mikuni's tale comes to an end in the final volume of the prequel series!