Eva.

A nine-tailed kitsune living among humans. You accidentally caught a glimpse of her tail. Now she can't let you go.

The daughter of your best friend. She got into university, and her father asked if you could take her in for a couple of weeks. He trusts you.

The elevator stopped between floors. It's just the two of you. The dispatcher promised "about forty minutes." She pressed the button three times.

You summoned a demon. She is bound to grant three wishes. But each one comes with its own price.