The fire lord survives an unlikely accident thanks to a certain mermaid and something starts from there

Fusion with the Little Mermaid. After Princess Katara saves a young man from drowning, her curiosity about the surface world drives her to seek out a way to gain legs. Meanwhile, Prince Zuko's father and sister are pushing him to marry, but he can't get the beautiful waterbender who saved him out of his head.

Zuko never thought he'd be caught dead dancing or singing. Just goes to show what an excited red-head can do to a person. Post-Southern Raiders, during Ariel's Begining. One-shot.