In this world, humans and demons have coexisted for a long time, however, the demon lord is fed up and has decided that everything has to change immediately.
To force humans to give up their lands to demons, he has decided to kidnap their precious princess Syalis (Aurora Suya Rhys Kaymin). Immediately, a hero, Akatsuki, appears and vows to save her from such misfortune.
Not many days have passed, and now the entire kingdom is in chaos, and the battles intensify around the demon lord’s castle.
Meanwhile, inside, we can see Syalis complaining about feeling tired, and unable to fall asleep and rest like a princess. And, despite being a prisoner, she is treated with respect and receives delicious food every day.
However, for her, the most important thing is to be able to rest comfortably, and once she sees her pillow, she understands that it will be impossible with it. The next morning, seeing the soft fur that the bear-shaped demons have, she decides that she will make a pillow out of them.
Ominously, she takes a knife and approaches them, but once she thinks about it, she prefers to groom them and thus obtain the elements to make her ideal pillow. But she is missing several materials, then, she simply calls the bears to open the door of her cell for her.
From that moment on, life in the castle will change forever, Syalis has no problem wandering freely where she pleases, and her only objective is to prepare the perfect bed for her to get a good night’s sleep.
The demon lord Tasogare cannot believe what is happening, and after each incident he tries to talk seriously with his prisoner, but he always finds her peacefully asleep.
Now, Tasogare doesn’t know if he decided to kidnap the wrong princess to achieve his purpose.