An unprecedentedly powerful Fukashigi appears, and My-Th finds even his finishing move blocked. He must defeat the Fukashigi for Yuna’s sake... Sora challenges the Fukashigi, which has reappeared. Furious at My-Th’s actions, Mutn lunges at him. Right in front of a worried Tatsuomi, Mutn transforms into a Kamen Rider. As the battle intensifies, a new enemy even appears...!?