A mortal kid gets pulled into a cosmic emperor competition he doesn't understand, armed only with a system that keeps revealing it's been helping him for a million years. The comedy hits because Xiao Yun is constantly three steps behind his own destiny, cracking jokes while reality rewrites itself around him. Every answer about why the emperor knew him, why the notes exist, why he was chosen, just opens the door to a bigger absurdity. The show knows exactly how funny it is to watch a regular person from Earth realize he's the linchpin holding multiple parallel worlds together.

Xiao Yun is an ordinary mortal boy from Earth, summoned by the gods. With courage and resolve, and aided by a power known as the epiphany system, he enters the contest for the title of Emperor, where his rivals are mighty beings with divine bodies. Questions pile up along the way: an Emperor from millions of years in the past somehow knows him and has left notes that come from the future, and no one knows where the epiphany system really comes from. Every parallel world now faces a looming crisis, and Xiao Yun is the only one who can save them. The ONA runs 52 episodes and blends action, adventure and fantasy.