See that white-haired little girl on the cover? The art may not be all that polished, but she's the protagonist of this book.
The main setting is based on The Hild Empire. Don't let the name fool you: this isn't just some empire on Earth. It's a vast empire spanning planets, universes, and even the void. The original story's nearly limitless worldbuilding opens up countless possibilities, so I wanted to create something new.
As for the story, it's mainly about two adorable girls, one a little girl and the other a young woman, going on adventures across different worlds and species. That's what you're getting, so just believe it. If you like unconventional thinking and want to have your worldview rebuilt, give it a try.