"Guess what?! Yotsuba's...a princess! Too bad Daddy doesn't know how pretty long hair is! It's okay, 'cos Yotsuba can show it to Asagi. She knows aaall about being a pretty princess! But wait! Yotsuba's going to Tokyo! Tokyo is where you go to be stylish and fancy, just like a real princess. The only problem is, there are aliens who are after Earth! It's okay, it's okay. Yotsuba has a secret move or two and will save everyone!"-- Back cover.

First published in japan in 2018 by KADOKAWA CORPORATION, Tokyo. This book reads from right to left.