An ordinary day for Seki Hisashi consists of working a nine-to-five shift at an auto parts company in Shinjuku, evading his flirtatious boss' advances, and then riding his motorcycle back to his apartment, where he lives alone. One morning, however, becomes anything but ordinary for the young salaryman. After Seki awakens to a naked woman lying beside him in his bed, he is even further shocked when she reveals her desire for them to be together. Even so, this does not explain her supernatural abilities, telekinesis being one of many. Rather than questioning her elusive nature, he immediately cuddles with her—finding the woman to be his ideal type. On his way home from work, a vision of his newfound love leads Seki to crash his motorcycle, giving rise to a police chase. Meanwhile, the woman awaits him at his apartment but grows restless, apparently unable to be apart from him. Arriving a moment too late, Seki watches her vanish without a trace, unaware if his unnamed soulmate will ever return. Little does he know that returning is something she indeed plans on doing.

Yako Katsuragi is an acclaimed high school detective, who, despite her young age, has solved many cases. In fact, there seems to be no case that she cannot solve, or any culprit that escapes justice. But within the walls of her detective agency lies the secret to her prolific crime-solving skills: the cases are actually solved by her assistant, Neuro Nougami. However, to call Neuro an ordinary man would be incorrect. In reality, he is a demon, who came to the human world in search of the ultimate mystery, having already solved every mystery in the demon world. With Yako as his proxy, he feasts on the negative energy released by humans when they commit crimes. Thus, he promises to help Yako solve the mystery of her father's death. But to do so, he must avoid drawing too much attention to himself, which is why Yako plays the role of the detective. As Yako desperately searches for the truth of her father's death, the unlikely duo continues to solve case after case in order to satisfy Neuro's ravenous appetite.

Megu is sent to Earth in her early teens, she is adopted by Mammi Kanzaki, a former witch who gave up her royal ambitions to wed a mortal. Mammi bewitches her husband and their two children, Rabi and Apo, into believing that Megu has always been the eldest child of the family. Under Mammi's tutelage, Megu learns to control both her abilities and impulses in order to prove her worthiness for the crown. This Rite-of-Passage subtext is continued throughout the series. (Source: ANN)

After an unfortunate accident, completely normal heterosexual high school student Kouta Shibaki is branded as the school pervert. With girls avoiding Kouta like the plague, truly the young man's worst nightmare has come to fruition! One day in the school library, he stumbles upon a peculiar book said to possess the power to summon witches. Partly out of desperation, partly out of boredom, Kouta decides to play along with the joke of a book, until an apprentice witch going by the name of Rurumo Maji Mojiruka appears before him. In an unusual turn of events, Kouta ends up helping Rurumo with some general witchery tasks in exchange for his soul being spared. Majimoji Rurumo follows the misadventures of Rurumo as she attempts to persuade Kouta to use 666 magical wish-granting tickets in her efforts to become a fully-fledged witch, unaware that every time she grants a wish, Kouta's life is shortened. Aided by Rurumo's familiar Chiro, Kouta must decide between helping Rurumo or saving his own life.