Sekai Seifuku-kei Imouto

is a Japanese light novel series written by Tsukasa Kouzuki, with illustrations by Sayu Ayuma. The series began publication on September 10, 2020 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Suddenly it becomes a relative story, but my sister Lemon is a genius who says something outrageous.

So when I said something strange with an excited face one morning, I was listening with a feeling like "Oh, again."

My sister said- "I feel like I was a princess in a different world!"

Awakened by the sealed power, her sister boarded an international conference and summoned a dragon to shake high-ranking government officials and quickly seize military facilities around the world-in a blink of an eye, she reigned at the top of the world. It was.

As for my sister's older brother who conquered the world, I was crying by the Japanese government and asked to control my sister (in a good mood) ...