 She must be very inventive when solving problems, and whatever solution she thinks of must work within a time limit.Yumi, Persia, Mami, and Emi join forces to protect the Earth by fighting aliens on the surface of the moon using their transformation abilities and magical powers.The OVA does nothing to advance the storylines in any of the individual stories, but is rather a side story for the four magical girl series released by Studio Pierrot.