Nights that had passed many days ago.
On the vast land, a secluded village here and there, an ancient castle stood alone—in the boundless night, it was like a small wooden boat floating on the great ocean, occasionally showing a dim light through its windows.
On the second floor of the castle, in a shadowed room, the Cat Slave Girl, Heidi, sat hugging her knees on the bed, staring blankly at the night sky outside the window. She had maintained this posture for a long while, and it seemed she would continue to do so, because she simply did not know what else to do—whatever she did would be rejected by the master of this place, and she could only stay in this room, obediently passing the time with the cats.
"Meow!"
There was a cat's call, and the black cat lying on the bed yawned, letting out a sound.
