In the new century where human beings and ghosts coexist peacefully, there is a middleman "Supernatural Association" to deal with the conflicts between the two.
Even recruiting people only depends on physical fitness and luck, and even the minimum age is only 15 years old...
In the "Gray City" Supernatural Management Bureau, at the age of 17, I am looking forward to my days of working while going to school...?
Purpose: Inspiring growth