In the World of Decade: From the Start, I Destroy Everything

Kadoya Tsukasa would never forget that day. The sky was covered in cracks, as if the whole world were crumbling. Space itself split into countless fissures, each one an entrance to an unknown world. On the edge of chaos and destruction, Ohma Zi-O, the supreme being who safeguarded the history of the Riders, exhausted all his strength trying to preserve order in the world.

Yet even the greatest power has its limits. In that catastrophe of time and space, one Rider after another vanished into the fissures, their forms and very existence as if they had never been. At last, when the dust settled, only Tsukasa Kadoya, as Decade, stood alone in the shattered world.

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Please do not imitate them.