I'm Kamen Rider Decade! From the Start, I Destroy the Ultraman World

"Celebrate! The Dark Kamen Rider Decade, history's most dangerous and powerful, who has transcended time and space and lives to destroy all things, has arrived in the Ultraman universe!"

Black-and-White Woz held his book and knelt reverently, his gaze feverish.

Mother of Ultra Marie nestled happily in his arms: "I'm sorry, Ken. I've already become my master's..."

Megumi and Laiye Bird slumped to the ground, tears glimmering in their eyes. "You were lying to me all along."

Carmeara was anguished and crazed, her expression twisted:

"I don't want the world. I only want you. Take me with you!"

He destroys the Land of Light from the start!

He kills Ken and Alien Empera, and wipes out Gatanothor!

He slaughters the Four Mysterious Ultras and puts Delacion and Zoffy to work for him!

He enslaves the Absolutians and the Reionics!

The Destroyer of Worlds has passed through this time and space. Will the many universes meet their end in destruction or be reborn?

PS: An invincible protagonist and harem story. The protagonist is ruthless and a scoundrel who plays with people's feelings. Don't read if that's not your thing.

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