It had been a few days since Luna went to that castle. The fact that she hadn't returned yet meant that Luna had already completed her exam and become a knight.
Lucifer wasn't worried about Luna in the slightest because he knew how strong Luna was. She might even be able to defeat the strongest knight if she wanted.
For Lucifer, the time without Luna around could be described as "heaven."
He could freely do whatever he wanted without having to wake Luna up every morning, buy her food, clean her room, or do her laundry like usual.
Since he started living with Luna, Lucifer had realized that she was extremely bad at housework. Therefore, most of the work was done by Lucifer.
Now that Luna was gone, he had more time to take care of himself.
But having to sleep with Test instead of Luna made Lucifer feel a little uncomfortable. Not because of Test's ear-piercing snoring, but because every time Lucifer woke up, the first thing that hit his face was Test's handsome face.