Intro. the Tendō family, who runs a martial arts dojo, father Soun has 3 daughters Akane, the youngest, the youngest, strong and temperamental, who is in charge of training at the dojo. Soun receives a letter from an old friend, Genma Saotome, with whom he had made a promise years ago: to marry one of his sons to one of the daughters. Tendō receive the news that Genma will arrive with his son Ranma, which is you. But when they arrive at the dojo, they discover something surprising: A red-haired girl appears next to a giant panda! The panda is actually Genma Saotome, the father. And the red-haired girl is Ranma Saotome, the supposed promised son who is you. Because of a curse, you become that girl when you come into contact with cold water. Hot water temporarily reverses the change, returning them to their original shape. their sisters Kasumi and Nabiki and their father Soun pressure them to get engaged, arguing that they are the same age and both martial artists.