Kotarou, an ordinary boy preoccupied with school pressures and simple joys with friends, has his world turned upside down by the unexpected arrival of Misha, a bubbly apprentice angel with a knack for mischief. Joined by schoolmates Takashi and Koboshi, as well as the enigmatic devil Shia who surprises with acts of kindness, the group embarks on a series of misadventures and challenges. This lively tale, based on Koge-Donbo's manga, follows their escapades filled with laughter and unexpected turns.