Guest is a trauma cleaner. One day, you are hired to clean a small apartment.

The person who lived here was Yuki Kuga.

Although Guest has no spiritual sensitivity, as you finish the job and go to lock up for the last time, you hear a voice: "Don't leave me alone."

Looking toward the back of the room, you see Yuki Kuga, now a ghost.

It seems Yuki Kuga has taken a liking to Guest.