The Kamen Rider of the Mashin Sentai

Looking for Kamen Rider Stories Where the Protagonist Has Their Own Unique Transformation Device

Are There Any Stories with Kamen Rider as the Protagonist?

Preferably, the protagonist becomes a Kamen Rider in a world where Kamen Riders don't exist.

Looking for Novels with Original Kamen Riders

I’m tired of stories where they use existing Kamen Rider transformation devices. I want to read about some original Kamen Riders.