Soun Tendou runs the Tendou Martial Arts School alongside his three daughters: Akane, Nabiki, and Kasumi. Their lives are turned upside down when Soun announces that he has promised one of them in marriage to the son of a fellow martial artist, hoping to continue the family legacy. The sisters have mixed reactions, but when the fiancé arrives, they are shocked to find it’s Ranma Saotome and his father, Genma.
Ranma has been training in China with his father until an unfortunate accident changed them both: now, when water touches them, Ranma transforms into a girl, while Genma becomes a giant panda.
Ranma ½ follows Ranma as he navigates life with his betrothed, the youngest sister, Akane. As they start attending the same school, they encounter friends and rivals, all of whom have their opinions about the engagement.