An occult madman named Kal Black summoned the death creatures from the realm of darkness to destroy humanity. These are reminiscent of the Echoes of “Bird Box”, but they can shapeshift into any form, human or animal, and could make humans suicidal. Any human who resisted it will be killed by them with weapons. Kal also used his dark magic to make his subordinates, the figures of dystopian fictions, to make his reign of terror more terrifying. 
  However, after the death of the last human, a French-Spanish young man named Francisco Alissenda, the Big Bosses and the death creatures snapped out of their darkness, and they turned on Kal, deposed him, and threw him to the Abyss of Darkness. After that, they buried and cremated the dead humans and restored everything back to normal, rejecting dystopian themes and brutalism.
  This is the start when spirits of dead humans like Francisco remained on Earth to guide the former creatures of occult darkness who were grieving for their souls and continuing their human societies for them. They began to eat, drink, and do things for the souls of the fallen. The Spirit world and Earth had a connection.
Follow the world in its post-Abyss Era that spanned a long time.

 The next few months after the final days of the reconstruction, many "children", death creatures as part-time children in their free time, were learning more about the lives of the fallen humans. Some wanted to learn their hobbies in their free time, while others wanted to continue their shapeshifting as those people in their free time. Kai, for example, was interested at the cosplay hobby life of a handful of dead Japanese cosplayers, so he, in his original form as Kai Kobayashi-Takahashi, started that during his free time from the car manufacturing plant. Alongside two other "young" death creatures as censors from Yokohama's Library Wars sector, Miyamoto Zsoldos and Taguchi Miyazaki (both 20 and 21 years old by looks), attended a comicon event held in Kawasaki in their costumes of their favorite anime characters. The event was busy but vibrant, and they were having so much fun.


Chapter 6 - Chapter 6 – “Children” of the New, Eternal Era