In the World of Zi-O: A Decade Watch from the Start

Yao Hui, a tokusatsu fan, bonded with the God-Tier Treasure Chest System.

He transmigrated to the world of Kamen Rider Zi-O in 2019.

But to his surprise,

he seemed to have landed in the timeline of the old Ohma Zi-O!

Sougo Tokiwa in 2019: "Why does that Ridewatch in your hand have even greater power than mine?"

A certain Kamen Rider just passing by: "Ohma Zi-O is the Demon King? Who said that? He's clearly a benevolent and virtuous Demon King!"

Hiryuu Kakogawa: "I'm so jealous! Why, even after I became Another Ohma Zi-O, do people still beat me to a pulp? This isn't fair!"

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.