A box that grants three wishes might seem like a dream come true.
At least that's what Keita thought, but inside the box he finds a girl. And this girl is no genie--Maki's a devil princess, and she's come to take Keita's soul! But she can only take his soul after he makes his third wish.
So, as a sheltered demon with little knowledge of how to be evil, Maki must rely on her…