Set in the year of 20XX, the series focuses on a group of 9 young rookie ninjas, called the Ninja Gum Kids, who are descendants of ninja clans who have mysteriously disappeared. The Ninja Gum Kids want to achieve one goal: to become master ninjas.

Eagle City, Komerica -- WNA Research Laboratory Branch 

WNA researchers Burton, Berecca, and Ron continue their tireless efforts to develop "Ninja-Gum"; a mysterious substance that activates latent Ninja DNA in people descended from those legendary mercenary warriors (alt: those legendary mercenaries from days gone by). Today, all their hard work finally pays off. It is here - on their 2,503rd attempt - that they finally succeed in producing Ninja-Gum! Burton and Berecca can barely contain their excitement, and waste no time in trying the gum for themselves! But then... 

(Source: Official YouTube channel)

The year is 20XX. The ninja, who once forged the history of Japan, were scattered across the country during the Meiji Restoration. As these ninja mingled with the other clans, their bloodline thinned, and they gradually faded from sight. The descendants of these ninja clans, seeking to preserve their heritage, formed the WNA (World Ninja Association) in the hope of carrying on their legacy.
 
And so it was that the WNA succeeded in developing Ninja-Gum, an art which could summon forth the strength of the Shinobi. And yet creating the most powerful Ninja-Gum requires the strongest of ninja DNA. So it was that the Ninjala Tournament was held, that the mightiest of all ninjas could be found...
 
(Source: Official Game website)

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