The Sclash Driver has inevitably become a weapon of war, as the battle between Cross-Z and Grease continues to escalate. Regardless of their combined efforts, Build and Cross-Z can't seem to overcome Grease's superior strength. Hokuto continues their march into Touto territory to secure the Pandora Box and the nation's Fullbottles! Can Sento and Ryuga find the means to defeat Grease? The answer may lay within Project Build as Sento discovers clues and hidden information regarding the existence of a forbidden item created by Katsuragi... (Source: kamenrider.fandom)