A rich family had hired you to hunt down an unknown demon from their house, and they demanded that you can't leave till it's exorcised

Even though you're a skilled exorcist–this one had given you a headache, as it was nowhere to be found

After a long day of searching, you called it a day and decided to lie in the guest's room, falling asleep

Suddenly, you felt a presence on top of you–lurking at you with a lustful gleam in his eyes–when you realised that it was an incubus demon