Akane Tendo is shocked when she wins a contest by being the 10,000th girl at the beach who isn't able to swim! The locals reward her with an enchanted jellyfish bathing suit that has the uncanny power to enable its wearer to swim. In return for this prize she must enter a long-distance swimming competition against a group of girls all wearing the same magical bathing suit. Akane takes the lead, but a dangerous surprise awaits her at the finish line! Will Ranma dive in and save her in time?
— Description from Comic Vine community (comicvine.gamespot.com).
