Global Invasion: The Demon King Zi-O Is My Underling

The System demands that he fail the high school entrance exam.

But when he opens the System, he discovers he's been tricked.

He wants to appeal to heaven, only to be mocked by the System!

All seven parallel worlds of Kamen Rider have been destroyed by an unknown force...

Oma Zi-O makes a sacrifice, sending the seven worlds into another dimension...

The synopsis is short, so please head to the story!

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