This is about a teen that loved to modify kamen rider toys, make new sounds, new powerup toys, even give old drivers new functions. One day he decided to make a version of the Amazon driver, with a power up item slot to change forms, and a modified version of the violent break lever. The slot would have a item called the 'Amazon Enhancers' inserted into it, which would add a new trait to the amazon form, like claws, or wings. The modified Violent break lever would have three triggers, which would activate three different attacks, the Amazon punch, Amazon Special(attack based on the Amazon Enhancer), and the Amazon Kick. He even made it with a new configuration he called Omni.

On a vacation to Japan he had planned to take it to a Tokusatsu convention, but he fell down a manhole from slipping on marbles, being pulled through a magic vortex.

He wakes up in a sewer, actually calling it a sewer was putting it lightly, it looked like an old cave that was converted into a waterway mixed with a Halloween maze. He began to look for a way out, feeling a very painful hunger building up as he walked, even the sight of rats made him drool.

Soon a creature jumped out of the water, and it looked like a Amazon from Kamen Rider Amazon, but with aquatic features. Seeing the creature made a instinct in the reader flare as he suddenly leaped at tha Amazon, a black smoke bursting out of him, when the smoke faded a Amazon like figure stood where the reader was, but it was feral, covered in horn like spikes. The Amazon reader then wiped the Aquatic Amazon out leaving a 'Amazon Enhancer' with a Symbol that looked like a aquatic humanoid.

The smoke appeared again as the reader fell unconscious in human form, as someone opened a manhole cover above.