The manga is a revival of Hosono's Sasuga no Sarutobi manga, where the "G" stands for the manga's "global" approach. Like the original love comedy manga, the new series follows the chubby genius ninja Nikumaru and the beautiful female ninja Mako. The new story takes place in modern Japan at the "Way of the Ninja Academy," where Nikumaru and Mako represent Japan in a fierce battles to become "Ninja Master."