Kakogawa Hiryuu rules over the world as Geiz attacks Sougo, bent on destroying Zi-O, without realizing that Another Zi-O II is his real enemy! Knowing the promise his friend made once before, Sougo cancels his transformation in the hopes of jogging Geiz’s memory. Meanwhile, Kaito Daiki returns in search of a new treasure from the twisted world, bringing him into the service of Swartz…