City of Knights

Neo Ninja Town is a large city divided into districts controlled by various private organisations. The focus on advanced technology has led to unforeseen consequences, such as abandoned buildings and mutated life in the sewers, some of them occasionally going to the surface to attack.

When five claymores suddenly appear in different parts of Neo Ninja Town, only a few people are able to pull them out of the ground. Those five are chosen by a mysterious group to become part of the Secret Shinobi Chivalry project, a group of "Knight-Ninjas" whose goal is to clean up the streets of Neo Ninja Town.

However, the power contained inside these swords have grabbed the attention of the Grandmaster, a mysterious figure who not only leads the city's underworld, but controls many influential organisations in the city like the Tamaki Walnut Company. Will the Knight-Ninjas' power fall into the wrong hands?