Knight War Begins with Diend

In a world where Kamen Riders did not exist, suddenly one day various Kamen Rider monsters appeared all over the world. The whole world was in an uproar. When people were helpless, the hope of the world appeared. News of Kamen Riders destroying monsters appeared one after another around the world. People rekindled their hope of fighting monsters, and then discovered that the war between Kamen Riders had begun! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.