Cold water triggers a gender swap, hot water reverses it — sustained comedic and social material rather than a single repeated gag.
Nearly 200 episodes built as episodic comedy — you can enjoy stretches without tracking a continuous overarching plot.
An early major work by Rumiko Takahashi, frequently cited as popularizing tropes now standard across harem-adjacent romantic comedy.
Not strictly required for most stretches — the show is built episodically like a sitcom, so you can enjoy individual arcs without needing to track a continuous overarching plot.
Not directly connected in story, but both are major works by the same creator, Rumiko Takahashi, with Ranma 1/2 predating and influencing tropes that carried into her later work.