In the Ultraman World, but with a Kamen Rider System

Ultraman Fanfiction: The Protagonist Is a Monster or Controls Monsters

Looking for Kamen Rider Novels, Not One Where Someone Transmigrates Into the Kamen Rider World

Uses Kamen Rider summons in the original world.

Kamen Rider Stories Set in the Real World, Not the Kamen Rider Universe

Are There Stories Where the Protagonist Becomes a Brand-New Ultraman Instead of an Existing One?

I mean stories where the protagonist becomes a brand-new Ultraman, not transmigrates into an old one like Tiga, Cosmos, or Zero, and not one of those especially powerful Ultramen either. A completely new one.

Kamen Rider Fans, Come On Over! Bring Out All Your Kamen Rider Books!!!!