In a post-apocalyptic world dominated by the so-called "Numbers," each human will have their identity branded with their own "Count," which could define any number related to their life. May it be one's walked distance or amount of compliments given to them by others, this Count could lead them to the abyss when it has dropped to zero. In the year 305 of the Alcian calendar, Hina has inherited a mission from her Mother, whose Count has depreciated to zero, to search for the Legendary Red Baron. In her adventure, she meets a half-masked swordsman named Licht who tries to hide his identity, as he is known as a degenerate for having an incredibly low Count.

In this brand-new adventure, some Class 1-A students are sent to hone their survival skills at a training course. Having yet to receive their provisional licenses, they're eager to cut loose and have a little fun. They quickly discover that the danger they face is no simulation! It's going to take their combined training, teamwork, and quick thinking if they're going to pass this assignment!

Ever since watching a magic show held by him and his wife Maeve, Makoto Shiranui has always admired Mamoru Hoshisato—a world-class magician, as well as friend of his parents—and came to Tokyo to become his apprentice. Kana, nicknamed Hatena, is the couple's daughter and his childhood friend. As the hustle and bustle activities in Tokyo catches Makoto off guard such as burglaries by a beautiful thief, he depends on Hatena's comforting side. When he came to Hoshisato's now-haunted mansion to reunite with his childhood friend, he is greeted by the family's butler and maid, Jeeves and Emma along with Hatena, only to discover that they are not as compatible anymore.

"Mine has been a life of much shame." Tokyo, 2036 (Showa year 111): a revolution in medical treatment has conquered death... By means of internal nanomachines and the "S.H.E.L.L." system whose network controls them, human beings suffer no diseases, require no treatment for injuries, and are guaranteed a 120-year lifespan, free from illness. Yet this consummate social system warps the Japanese nation in a host of ways: unresolved economic disparities, ethical decadence resulting from deathlessness, grave environmental pollution, and the "Human Lost" phenomenon, in which people themselves, disconnected from the S.H.E.L.L. network, become malformed. Japan teeters wildly between two potential futures: civilization's restoration or its destruction. Atmospheric pollution suffuses "Route 16" in the Outside—the area outside the Route 16 beltway. Youzou Oba, who lives an idle, drug-saturated life, joins Masao Horiki, a mysterious man who associates with the drag-racing gangs, on an incursion Inside—the area within the Route 7 loop where the privileged class lives—only to be embroiled in a violent struggle. When he encounters a malformed sufferer of the Human Lost phenomenon, a "Lost," Youzou's life is saved by Yoshiko Hiiragi, a girl of mysterious abilities who belongs to the anti-Lost agency H.I.L.A.M., and he discovers that he himself also possesses extraordinary powers... Degradation and death. Life and hope. Buffeted by fate, a man tears himself apart and cries out. Rage. Sorrow. Pathos. Consumed by despair and bitter tears, Youzou Oba is himself transformed into a demon. A human lost... or a human who can find himself?