When Suburu, Mahoro and company set off to the beach, they get sand kicked in their faces by a giant crab battle robot. The cloud crab has a screw loose and wants to turn the female sunbathers into a topless crowd! Well, Mahoro, ever willing to dive into the thick of danger, tightens up the straps of her bikini and vows to make crabmeat out of this robotic crustacean!