Su Tian awakens on Blue Star, a world where the fate of nations and individuals is decided within 'Knight Century,' a virtual reality game deeply integrated with the lore of Kamen Riders. Replacing real-world warfare, this system governs everything from personal disputes to college admissions. As an orphaned student facing the critical entrance exam, Su Tian possesses a unique advantage: memories of Earth's extensive tokusatsu history.

While his classmates struggle with obscure trivia about Rider forms and belts, Su Tian effortlessly aces the written portion, knowing secrets of powerful Riders like Decade and Ohma Zi-O that this world has yet to discover. However, academic knowledge is only half the battle. The upcoming martial exam requires entering the game itself to fight.

Facing arrogance from elite students like the class monitor She Yuanlong, whose father is a famous high-ranking player, Su Tian must prove that his encyclopedic knowledge translates into unmatched combat prowess. In a world where being a 'Proxy Player' is a profession, Su Tian is ready to show he isn't just guessing; he is playing to win.