The once-proud Japanese Ninja disappeared after the war when GHQ disbanded their organization.However, in reality ninjas still exist secretly and it is said that there are 200 thousand of them.And some elite ninjas are secretly operating behind the scenes in national-level struggles.On the other hand, grassroots ninjas often cannot find jobs, and one of them, Yun Yin Jiu Lang, also lives a life similar to that of the NEET generation.However, there is finally a major "endurance" around Ninomaru!.