Reborn as the Emperor Rider: Demon Slayer Opening

When the almighty Kamen Rider Decade falls to Ohma Zi-O's devastating punch, fate intervenes in the most unexpected way. Li Xiu, an ordinary man knocked unconscious by a delivery rack accident, awakens as the legendary Kadoya Tsukasa. Standing before the shimmering dimensional portal, he makes a vow: Decade's journey will not end in disgrace. Armed with the Emperor Rider's powers and thrust into a demon-infested world, he'll carve a new path across dimensions—one world at a time.