The Kamen Rider Era Begins: From the Start, ZZZ

This is an age when anyone can become a Kamen Rider. Even without special bloodlines or physiques, an ordinary citizen can transform into a grunt to defend themselves against villains who turn into monsters.

Zhou Zhuang appears to be an ordinary unemployed drifter, but in private he's an agent (or so he claims). From the start, he charges straight into a two-star Impact Lord and transforms into Kamen Rider ZZZ, a form never before seen in history.

Why is this guy's Driver mounted on his chest?

What do you mean, you're just naturally "built different"?