Transmigrate to 01: Kamen Rider Mantis Blade

Amamiya Akira is a shut-in college student who transmigrates into the world of Kamen Rider 01 after an accident, where he obtains a Mantis Blade Driver from who-knows-where. This is the story of his adventures after latching onto Hiden Aruto, a generous source of free meals. I don't like protagonists having a bunch of belts, so in this story there's only one: the Mantis Blade Driver.

No female lead.

This should be an ensemble story. The protagonist will have relatively little screen time early on, and the plot will stick fairly close to the original. I'll give him more of a presence from the middle onward.