Kamen Rider: High Beam Rider - Starting with Saber

Lan Su, who unexpectedly gained the power of light and darkness, was hunted down by the Black God. By chance, he arrived in the world of Zi-O, obtaining the "Oma Descent Record," a combination of fantasy and Oma powers! The Black God slumbered, not fully recovered. This gave Lan Su a chance to breathe, and he embarked on a path to become stronger. Light and darkness power + fantasy omnipotence + Oma power + creation power! Sounds promising, right? After obtaining these powers, he arrived in the world of Agito, declaring, "Black God, you are the challenger!" As he passed through various worlds, he also resolved many of the Riders' regrets! The Reiwa Four Riders of Apocalypse are too abstract? OZ spent ten years honing his skills? The helpless forgetting of Zero and his sister? The tragic ending of Marco and Yuuka in 555? No! I decide the ending of the story! (No OOC, the Riders also have their own highlights, no system, there is a female lead)