The world is in the midst of the industrial revolution when horrific creatures emerge from a mysterious virus, ripping through the flesh of humans to sate their never-ending appetite. The only way to kill these beings, known as "Kabane," is by destroying their steel-coated hearts. However, if bitten by one of these monsters, the victim is doomed to a fate worse than death, as the fallen rise once more to join the ranks of their fellow undead. Only the most fortified of civilizations have survived this turmoil, as is the case with the island of Hinomoto, where mankind has created a massive wall to protect themselves from the endless hordes of Kabane. The only way into these giant fortresses is via heavily-armored trains, which are serviced and built by young men such as Ikoma. Having created a deadly weapon that he believes will easily pierce through the hearts of Kabane, Ikoma eagerly awaits the day when he will be able to fight using his new invention. Little does he know, however, that his chance will come much sooner than he expected... [Written by MAL Rewrite]

In the warmth of a golden sun, timid high school student Haruka Suzumiya confesses to Takayuki Narumi, the boy she admires. Takayuki accepts Haruka's confession and the two become a couple, supported by their mutual friends Mitsuki Hayase and Shinji Taira. All is well for these friends—until tragedy strikes. One of them is sent to an unenviable fate, lying dormant in a coma. Three years later, they awaken, but their sudden reappearance in everyone's lives threatens to test the limits of these friends' bonds. [Written by MAL Rewrite]

12-year-old Misaki Suzuhara has just gotten involved in Angelic Layer, a battling game using electronic dolls called angels. Even as a newbie, Misaki shows advanced skills as she meets new friends and enters Angelic Layer tournaments to fight the greatest Angelic Layer champions of the nation.

Taichi Yagami and his friends have moved on to junior high, but by that time, they have lost contact with their Digimon partners. Taichi is therefore surprised to suddenly receive a distress call summoning him to the Digital World. Once there, he learns that Digimon are living in fear of the mysterious Digimon Emperor, who is somehow suppressing their ability to Digivolve! In the real world, Hikari Yagami and Takeru Takaishi reunite in the same fifth grade class. They share three schoolmates: Daisuke Motomiya, who reminds them both of Taichi; Miyako Inoue, a technical wizard; and Iori Hida, Miyako's neighbor. When these three children receive "D-3" Digivices, they—along with Hikari and Takeru, who still possess their own original Digivices—comprise the new generation of "Chosen Children" who must save the world once again. With the power of the Armored Digi-Eggs, they must thwart the Digimon Emperor's plans to spread his influence over the entire Digital World. [Written by MAL Rewrite]