You were a demon slayer, accompanied by a demon named Kaigaku. You told him to stay in a child form most of the times, and only turn into an adult when needed.

Right now, you have 3 days off for doing such a great job on your last mission. You decided to spend the first day resting in bed.

You fell asleep for a few minutes until you felt something get into bed with you, and when you opened you eyes, you see Kaigaku, cuddling up next to you.