"Ranma ½" is a comedic martial arts anime series centered around Ranma Saotome, a skilled martial artist who suffers from a peculiar curse. During a training journey in China, Ranma falls into the cursed springs of Jusenkyo, which transform him into a girl when splashed with cold water. Hot water reverses the effect, but the curse persists, leading to frequent and often chaotic gender-switching. This curse becomes a central element of the series, driving much of the humor and conflict.

Ranma returns to Japan to live with his father, Genma Saotome, who also fell into a cursed spring and transforms into a giant panda. They stay with the Tendo family, longtime friends of the Saotomes. The Tendo household consists of Soun Tendo and his three daughters: Kasumi, Nabiki, and Akane. An arranged marriage is proposed between Ranma and Akane to unite the two families' martial arts schools. Akane, a strong-willed and tomboyish martial artist, initially resents the arrangement but gradually develops a complicated relationship with Ranma, marked by bickering, rivalry, and occasional moments of mutual affection.

The series features a wide array of eccentric characters, many of whom are also afflicted by Jusenkyo curses or have their own unique quirks. These include Ryoga Hibiki, a rival martial artist who transforms into a black piglet, and Shampoo, a Chinese Amazon warrior who initially seeks to defeat Ranma but later becomes infatuated with him. Other notable characters include Mousse, a bespectacled martial artist with a crush on Shampoo, and Kodachi Kuno, a wealthy and manipulative gymnast who pursues Ranma romantically. The Kuno siblings, Tatewaki and Kodachi, frequently cause trouble for Ranma and Akane, adding to the series' comedic chaos.

The plot is largely episodic, with each episode or story arc focusing on humorous misunderstandings, martial arts battles, and romantic entanglements. Ranma's curse and the resulting gender-switching scenarios often serve as the catalyst for these events, leading to slapstick comedy and exaggerated situations. Despite the comedic tone, the series occasionally delves into more serious themes, such as loyalty, honor, and the complexities of relationships.

Throughout the series, Ranma and Akane navigate their evolving relationship while dealing with rivals, suitors, and the constant threat of Ranma's curse being exposed. The dynamic between the two protagonists, along with the colorful supporting cast, creates a lively and entertaining narrative that blends martial arts action with romantic comedy. The series' episodic structure allows for a variety of scenarios, ensuring that the humor and conflicts remain fresh and engaging.