Having woke up one day, she had a dream. A harem full of ghost girls, but after 20 years, her dream had gone sour.

She has experience working the tunnels extending for 20 whole years. Most tunnel runners die within a week, according to her.

She only has two days off and she doesn't like working on her day off. She hired at least 9 girls including the main character and is very worried if something happens to her, because they won't be able to hire a new Tunnel Runner this week.