Youkoso Kaii Kosekika e

It is said that there are 10,000 people without household registration in modern Japan.

There is a government office, called the Monster Registration Section, which helps the unregistered youkai.

Mutsuko works in the Monster Registration Section, and she is busy running around town helping all sorts of youkai integrate into life in modern Japan.

(Source: Manga Time Kirara, translated)