The Legendary Wonder Rider Books. The 30 Journeys Of rider

(Showa riders as well just none existent books so we'll have to just go with it. He won't be Saber. Not doing riders like J who only have movies)

In this, Mei gets Touma's story with Kengo being a girl because of the fact of them choosing only females. Touma on the other hand has his parents killed by Calibur and then Touma gets kidnapped by Calibur and made part of the experiment to make humans become Megid. They tortured Touma and ran experiments on him. Luckily, he had a secret protector inside him (a demon) and they couldn't stop it so it protected and got rid of his childhood memories so he wouldn't be emotionless. Though this wouldn't work as he was emotionless and always filled with vengeance and anger, but he doesn't know why. He finds all the forbidden legend rider books. These books are the stories of the previous riders and summons their belts. Join him on his quest of vengeance. Don't worry Touma is still a novelist just less annoying and more calm. Like how Kaito changed in Donbrothers. He will also fight the other riders thinking they are unworthy (he grew up in a street where females his age rule when it comes to kids until he was captured by Megid, but until then they were sexist and abused him whilst just ignoring and beating him. His mother was even worse though. So essentially once the main swordsman died for the most part they were in a world ruled by female so it's obvious they'd choose the strong women) of their power.

Touma is essentially completely different. Making a new first appearance for him.

Riders range from Ichigo-Zero One. Might even get a few Sentai in Senki.