The slapstick romantic comedy centers around an ordinary 16-year-old high school boy named Yūto Amakawa who is protected by a spirit—specifically, a beautiful, sword-wielding cat girl spirit named Himari. Yūto is descended from a family that has subjugated demons since time immemorial. The charm that once protected him is now impotent, but fortunately, at that same moment, Himari appears before him as his new guardian.
Twenty-five years after Éclair and Lumière rescued the galaxy from destruction, the Galactic Trade Organization act on behalf of universal peace by combating criminal activity. Two trainees, Ascoeur and Q-feuille, work their way to membership.
Four years ago, Kazuma Kannagi was defeated by his cousin Ayano Kannagi for the right to be the successor of Enraiha, a sword passed down in the Kannagi family. His defeat, along with his lack of talent for En-Jutsu, the fire arts, the Kannagis' specialty, resulted in his banishment from the family. Now, Kazuma returns as Kazuma Yagami, a skilled master of Fū-Jutsu, the wind arts.
Rushuna is a very beautiful gun expert that travels through the world with one purpose which is to make the world a peaceful place by, instead of fighting with weapons, taking away the people's will to fight by giving them a smile. In this quest she meets Yajirou, a mercenary that joins her on the journey.
After a war occurred in the 20th century between humans and demons. Since that time, the monsters rule the world in fear but keep relatively hidden from public view. A boy named Bokka ponders the past and wonders what became of the Meros Warriors who defended the world so bravely against the demons.
Meet Narue, an adorable schoolgirl with a secret. She's really an alien with powers right out of a sci-fi comic! But growing up is never easy, and sometimes it doesn't help when you're from outer space. Join our spunky heroine as she faces androids, alien invaders, and her first date with the boy next door. It's the sci-fi comedy that's a direct hit to your heart!