The New Demon King of Time: The Dusk Era

Three students, Xiyang, accidentally transmigrates to the world of Kamen Rider Zi-O during a thunderstorm at sunset. A Zi-O Oma Form Ridewatch containing the power of origin appears out of nowhere in his palm. His arrival completely diverts the original timeline: Geiz, from 2068, sees him as the tyrant destined to destroy the world, while the Time Jackers scheme to seize his power over time.

After settling in at the 9-to-5 Sougo, Xiyang joins forces with Sougo Tokiwa. Amid the everyday bustle, he hones his control over his power, gathers the Heisei Riders' Ridewatches, and corrects the twisted history of the Riders. Refusing the fate of a destined Demon King, he sets out to protect those around him and forges his own sunset-colored path to kingship amid the surging currents of time.