Knight of Ruins

The Kamen Rider, who was born in the apocalypse, originally thought that he would be invincible just by mixing in the knight system, but... Is it really that easy? The conspiracy behind it, the sudden appearance of weirdos, the upgradeable zombies... Please look forward to everything (I haven't watched Knight's Careful Entry, and I have almost forgotten about Knights. There must be a gap in the settings. Please forgive me for going to other worlds in the future. Currently, only Fate and Kamen Rider Zio have been confirmed)