Ayano Jones is the younger twin to Jack Jones. Jack believes she was kill by Professor Clover and left with Silver Heart. The younger twin happen to be alive, and is working for Professor Clover. What happens when these twins meet again? Would they remember each other?

In the city of Matan, a chemical scientist is kidnapped by anarchists bent on destroying all sense of order in the world. They force the scientist to make Pandorax, which splits Matan into three distircts ; Tavan, Kavan and Savan. From the Pandorax chemical comes monsters known as Smashers, who terrorize the people in these districts. The son of the kidnapped scientist, Benjamin Offton, is finally ready to fight against the anarchists, who refer to themselves as Smash, as he becomes Kamen Rider Build!

Danball Senki X is a Danball Senki Wars fanfic. This is a story about Houjou Muraku and Hoshihara Hikaru's adventure as they continues to explore with Arata and their new found friends to protect the world.