Ultra's Infinite Black Hole

On Earth, humans are superior, but who knows in the future whether we can resist the invasion of races from outer space and whether humans should perish? Will it fall? Who knows again? The future is always difficult to predict For the main character in the book, please refer to the Boss in Kamen Rider Build Rider, Eberlut. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.