Story
After his grandfather’s death, Saiga Kikumaru learns the truth of his origins.
In a nutshell:
1. He learns that Japan is inhabited by demi-humans, animal-eared people eking out a secretive existence in the shadows of human civilization.
2. Only the human underworld, where the Saiga clan reigns through its demi-human connections, knows of their existence. Kikumaru learns he is a Saiga clan heir.
3. Kikumaru learns he is the illegitimate child of Magoichi, head of the Saiga clan, then is quickly embroiled in the succession war triggered by his father’s sudden disappearance.
4. Under the loving guidance of a cat-eared ninja girl named Touka, he manages to awaken his latent powers.
5. After rigorous training, he manages to repel the attacks of his longtime frenemy, earning a brief respite.

Anyway, that’s the gist of it. As you all probably guessed, the story doesn’t end there.
Kikumaru has now won the support of the cat-eared Touka, mightiest of all ninjas, as well as Chika, the very assassin who previously tried to kill him. Just as Kikumaru starts to wonder how
the Saiga may be rebuilt, several mysterious new faces step onto the stage! Racoons, foxes, and his long-lost little sister… And what’s this? The cats of the Fuma clan are making a comeback! The curtain rises on the final chapter of this modern-day ninja romp as it spirals into chaos! Get ready to nyan-nyan and nin-nin!