The Main Vocalist of Choi Jisu is a mammoth, cultured nation, ruled by JY Park with an even hand, and renowned for its museums and concert halls, ban on automobiles, and keen interest in outer space. The compassionate, democratic population of 5.492 billion Midzies are fiercely patriotic and enjoy great social equality; they tend to view other, more capitalist countries as somewhat immoral and corrupt.

The large government juggles the competing demands of Education, Healthcare, and Administration. It meets to discuss matters of state in the capital city of Yeonsu-gu. The average income tax rate is 69.0%, and even higher for the wealthy.

The Midzy economy, worth 392 trillion Won a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. The industrial sector, which is fairly diversified, is dominated by the Information Technology industry, with significant contributions from Tourism, Book Publishing, and Basket Weaving. Average income is 71,451 Won, and distributed extremely evenly, with little difference between the richest and poorest citizens.

Even in the most hardened climate scientists break down at the sound of a single drop of rain, children's TV shows are having a gay old time, modesty is treated with the side-eye, and trolls insist that strings of racial slurs mean "good morning" in obscure languages. Crime is totally unknown, thanks to a capable police force and progressive social policies in education and welfare. Choi Jisu's national animal is the Sloth, which frolics freely in the nation's many lush forests, and its national religion is K-Pop Stan.

Choi Jisu is ranked 45,673^rd in the world and 6^th in Itzy for Most Extensive Public Healthcare, scoring 3,315.69 on the Theresa-Nightingale Rating.