Ninjas enjoyed glory in the Japan of bygone times. They disappeared when their organizations were dissolved during the country's Allied occupation of Japan. However, their existence continued in secret. Some say that their ranks numbered 200,000 members. Among these, elite ninjas covertly dealt with crises at a national level. On the other hand, marginal members found work hard to come by. One of these ninjas between jobs was Kuro Kumogakure.

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