The Acceler Rider Is Actually My School Beauty Ex-Girlfriend

Chen Yu transmigrates to an alternate world overrun by monsters, where he awakens a God-level Sign-In System. Choosing a path of caution, he spends ten years quietly signing in and steadily developing his powers while keeping a low profile. In this dangerous realm, humanity is protected by individuals capable of transforming into Kamen Riders, who have formed an organization dedicated to maintaining peace in human cities. During a sudden monster attack, Chen Yu is shocked to discover that the Kamen Rider Acceler protecting his city is none other than his former girlfriend, the renowned school beauty. As an unprecedented army of monsters launches a devastating assault, crippling the Rider organization and threatening to conquer the city, his ex-girlfriend fights desperately to shield him from harm. Witnessing her sacrifice, Chen Yu realizes he can no longer remain hidden. He silently produces the Ohma Zi-O Ridewatch, declaring, "Do not worry, your King has returned," before initiating his transformation.