"Ninku" is an anime series set in a fictional world where ninja clans possess unique abilities known as Ninku techniques. The story revolves around Fuusuke, a young and carefree ninja from the Ninku clan, who awakens after a 15-year slumber to find the world drastically changed. The Ninku clan, once revered for their skills, has been disbanded, and its members are hunted by the imperial army under the orders of Emperor Horusu. Fuusuke, unaware of the events that transpired during his sleep, embarks on a journey to uncover the truth and reunite with his scattered comrades.

Fuusuke’s journey introduces him to a diverse cast of characters, including his loyal companions Aicho and Rihoko. Aicho, a former Ninku clan member, is a skilled fighter with a serious demeanor, while Rihoko, a young girl, provides emotional support and a sense of innocence to the group. Together, they face numerous adversaries, including the imperial army and rogue Ninku users who have turned against their own kind. The series explores themes of loyalty, survival, and the struggle to preserve one’s identity in a world that seeks to erase it.

The plot is driven by Fuusuke’s quest to confront Emperor Horusu and dismantle the oppressive regime targeting the Ninku clan. Along the way, the group encounters other Ninku users, each with their own motivations and tragic pasts, adding depth to the narrative. The series balances action-packed battles with moments of camaraderie and introspection, highlighting the bonds formed between the characters as they navigate a world filled with danger and betrayal.

The anime’s structure follows a mix of episodic encounters and overarching storylines, with each arc revealing more about the Ninku techniques, the history of the clans, and the political machinations of the empire. The climax builds toward a confrontation with Emperor Horusu, whose true intentions and connection to the Ninku clan are gradually unveiled. The series concludes with a resolution that ties together the characters’ personal journeys and the fate of the Ninku legacy, leaving a lasting impact on the world they fought to protect.