This book will take you on a tour of the splendor of countless worlds.
Can a blade of grass cleave the sun and moon?
Can a grain of sand fill an endless sea?
Well, in short, the protagonist goes around showing off in all kinds of worlds. There is no harem, so if that's what you're looking for, don't bother. The author is a newbie, too, so if you only like beautifully written prose, this isn't for you.
This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.
