Set in the Edo Period, during a rainstorm, a temple receives a strange "visitor": Kurebayashi Aki, a high school student magically transported from the 21th century. Due to her uniform, which seems different from the clothing of that time, the people of the temple believe her to be an angel that has descended to help them with their problems, though Aki is really just a normal girl. Still, she figures she might as well help whoever she can while trying to find out how to go back home.