Episode 1: The Destroyer's Arrival

A Kamen Rider Decade X How not to Summon a Demon Lord Story. Instead of a Demon Lord, Diablo who were summoned in the game, what if the Son of Kadoya Tsukasa and Natsumi Hikari also known as Kamen Rider Kivala, named Ryuujin Kadoya who plays a brand new MMMORPG, reads Hentai, loves Photography like his father and also has the Laughing Pressure Point like his mother was accidentally sent to another world as a Summon and has the powers of Decade and the 20 Heisei Riders?