[Kamen Rider Ex-Aid x Sword Art Online Crossover!] Years after Gamer Rider defeat the Bugster and the world is peaceful. In the real world, Masaki Saiba is a Genius Master Gamer S living with his twin younger sisters, Momoi and Midori. They were enjoy buy the new Video Games from game store until aurora curtain took them away. They are in the void and heard a crazy laugh, they see it was Dan Kuroto in his Prime version and Tsukasa Kadoya much to surprise of the trio gamer. Tsukasa explain that they need to save the world from the Bugster, Gamedeus, and Kamen Rider Cronus in the world of Sword Art Online. Masaki accept the offer and Kuroto inject Masaki with Bugtser Virus syringe, giving Masaki in pain before give him the Gamer Driver and send the trio to Aincrad. They will survive the games and fight the Bugster as Kamen Rider Ex-Aid... Let's clear the game without continue!