Teenage martial artist Ranma is cursed--he turns into a girl every time he is splashed with cold water. Now, he must fend off the advances of a boy who has fallen in love with him and, at the same time, try to convince the girl who he is promised to in marriage that he would make a good husband.

Akane catches Ranma trying on her new bra, and the arrival of Nodoka, Ranma's mother, only feeds the flames that have Akane wanting to beat some sense into Ranma, whose careless comment about her bust possibly shrinking has her enraged.

Ryoga has fought Ranma many times and he always loses, but now Ryoga has found a new technique that just might work--if he can stay depressed enough!

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!...