Compati Hero: Kitsune

Compati Hero: Kitsune is an action-adventure RPG developed and published by Banpresto, Namco Bandai and Square Enix for XBOX 360, PlayStation 3 and Wii. The game is part of the Compati Hero universe.

Plot
A teenage fox named Kitsune learns that he is a mermaid after he gains a tail and scales on his thirteenth birthday.