Kotarou was essentially meant to be an ordinary boy, concerned with the stresses of schooling while leading a simple life alongside his friends. To his dismay, he one day encounters the excessively cheerful Misha at his doorstep, who unexpectedly asks to be friends. Even more startling is the fact that Misha is an apprentice angel, yet she causes more harm than good. Together with Kotarou's schoolmates Takashi and Koboshi, and the so-called devil Shia (who, once again, manages to do more good than bad), this group of friends spends their days embroiled in various adventures and troubles.