Initially, Kotaro was just another average boy who was preoccupied with academic pressures and enjoyed a simple life with his pals. However, his peace was disrupted when the overly cheerful Misha appeared at his doorstep out of the blue, requesting to be friends. To add to his shock, Misha was an apprentice angel who did more harm than good. Kotaro's buddies from school, Takashi and Koboshi, along with the so-called devil Shia (who can actually do more good than bad), join forces with him to embark on plenty of ventures and confrontations. This anime is adapted from the manga created by Koge-Donbo.