Kamen Raidaa Autosaidaazu

Having learned the good intentions of humans, the super-intelligent Zein aims to "extinguish malice" and concludes that humans should be eliminated for that purpose. Only the outsider Kamen Riders willing to use their evil powers to achieve their goals to stand against Zein. But will the day come when these evil Riders join forces with each other?

A grand-scale story that crosses over the worldview of successive series.