Loki, the Norse god of mischief, has been exiled to the human world for what was apparently a bad joke. Along with being exiled, he's forced to take the form of a child. He's told the only way he can get back to the world of the gods is if he can collect auras of evil that take over human hearts, and so to do this he runs a detective agency. Loki is soon joined by a human girl named Mayura who is a maniac for mysteries, and she soon helps out in her own way. However, soon other Norse gods begin to appear, and most have the intent to assassinate Loki for reasons unclear.

Mary Smith is a clumsy girl with wild red hair who can't seem to do anything right. After moving in with her Great Aunt Charlotte, Mary finds herself lonely and bored, until one day she spies a cat which seems to keep changing color every time she sees it. Curiosity gets the better of her and she follows it into nearby woods. Deep in the forest, the cat takes her to a clearing with dead trees and brown grass, where the only sign of life is a cluster of mysterious blue flowers that Mary has never seen before. The gardener of the estate later tells her that the rare species is called "Fly-by-Night," and is said to be sought by witches for its incredible magical power. When the strange cat returns to her one night, Mary is led once again into the woods, but this time to an old broomstick hidden by a gnarled tree. After she clumsily squashes some Fly-by-Night against the broomstick, it begins to glow, whisking her off into the sky. Her wayward journey ends at the Endor College for Witches, where she is mistaken for a new student. And so, Mary must learn to look after herself in this marvelous new world of magic, where things are not always as they seem. [Written by MAL Rewrite]

As another school year begins drawing to a close, the third-year high school students move steadily toward the next milestone of their lives: graduation. Among them are Mio Natsume, a girl burdened with lingering feelings; Hazuki Morikawa, a member of the concert band but distant from the others; and Haruto Souma, an athlete obsessed with baseball. Meanwhile, second-year student Ena Komiya seeks to revive the photography club to its former glory, refusing to let the organization be disbanded. Though this group lacks a strong connection with one another, their lives suddenly cross paths with the arrival of a third-year transfer student. While a transfer so close to graduation is unusual for most, it is business as usual for Eita Izumi. Due to his father's work, he has never been able to stay in one place for very long. But as luck would have it, their most recent relocation has returned Eita to his hometown for his final semester of high school. For better or worse, it also sparks the rekindling of old relationships left behind in the past. With graduation already causing its own share of anxieties, Eita's sudden arrival brings these students' carefree days to an abrupt end. Long-forgotten memories, deeply buried emotions, and inspiring new passions—everything is brought to light in their bittersweet final semester. [Written by MAL Rewrite]

For 500 years, the Taboo Emperor, Arthur Gaz, ruled the Gaz Empire with an iron fist and conducted inhumane experiments on his own people. But his reign came to an end five years ago, when mighty warriors—later known as the Eight Heroes—defeated him in a battle for the capital. His death ended the 300-yearlong war between the Gaz Empire and the alliance of six nations. In the present day, Tooru Acura is a former saboteur from the war who has difficulty settling into the peaceful world, as he cannot find a job where he can put his fighting skills to use. An opportunity appears before him, however, when he meets a white-haired Wizard named Chaika Trabant. With a coffin on her back, she is searching for the scattered remains of her father in order to give him a proper burial, and she hires Tooru and his adoptive sister Akari to help her. However, the six nations alliance, which have now formed the Council of Six Nations, dispatches Albéric Gillette and his men from the Kleeman Agency to pursue and apprehend the late Emperor Gaz's daughter—Chaika. With the shocking revelation of Chaika's identity, the Acura siblings must choose between helping her gather the remains of the tyrannical emperor and upholding the peace the continent strives to maintain. [Written by MAL Rewrite]