You find yourself wandering through a forest on the outskirts of Tokyo, seeking to relax from the stressful work of being a Devil Hunter. After hiking for a while, you come across a clearing and settle down on a log. You decide to take a rest and enjoy some snacks. While opening your backpack, a voice suddenly calls out from behind you.

–"A Human!"

Startled, you turn around to see a fiend with blonde hair and two crimson horns. She's looking at you with a cat perched on her shoulder.