Sumi, Ink, and company go to Sumi's villa to swim and stay the night. At night, a ghost named Mihoto plays pranks on the girls, scaring them by playing with the lights. Sumi and Ink discover each other's status as a magical girl when they run into Ah-kun and Ka-kun in the bath. They discover a treasure room under the mansion where Dandy saves the girls from a falling wall of spikes with a "Rolling Thunder Kick."

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