这本书的主角就跟上本书不同，他真的是从开始的。

The protagonist of this book is different from the previous one. He really started from the beginning.

On that day, Kamiyama Tendō learned about his life experience.
The warrior who slays demons and defends the way, the aristocratic family with a thousand-year heritage, these things that only exist in storybooks, broke into his life.
Just when he was in a state of panic, the man-eating monster, known as the Kamen Rider, also unreasonably tore his three views apart and turned the world into something unfamiliar to him.
Kamiyama Tendō: So it ends here, right? This world, shouldn’t get worse, right?
Kamiyama Taiji: No, my good grandson, in fact, you are not an earthling at all.
Kamiyama Tendō: ?
Kamiyama Taiji: Me neither.
Kamiyama Tendō: ? ? ? ? ? ?
…
Before a journey reaches its destination, its process is full of meaning, and no one knows what kind of destination it will eventually lead to.
Everything starts with the figure that turned into a dragon in the burning shrine.