Becoming a Shadow in the New World

"I want to become a Shadow-level user."
Born into an ordinary real world with this dream, Sid is reborn into another world, only to find that this world is too peaceful.
Just when he thought he would never become a true Shadow-level user, the world underwent a tremendous change.
Demons, vampires, angels, and gods have appeared one after another in this new world.
"Listen, the world is celebrating the birth of a Shadow-level powerhouse."
"That's what the shadow said."