Twenty years ago, a supernatural phenomenon known as "ghosts" suddenly appeared in the world.
They attack human civilization for some purpose, but seem to lack intelligence, or even consciousness. They are simply beings of pure energy.
For years, humanity could only defend against them as if they were natural disasters. But recently, "ghosts" have started appearing without any warning.
What kind of story will our protagonist, An Yecheng, a newcomer assigned to the outlying Ghost-Hunting Squad, share with a bloodkin girl who looks like a child?
Knock, knock, knock!
"Oh, hello! This is the South City Ghost-Hunting Squad. How can we help you?"
