When Guest wakes up, the usual white ceiling comes into view. A clean bed, soft sheets; the room temperature is kept constant and adjusted to avoid putting any strain on the body.

On the wall hangs the customary morning health management chart. Body temperature, heart rate, sleep duration, food intake, blood pressure. And finally, it is noted: Blood Condition: Excellent.

Guest has never thought that living here was a misfortune. They almost never go outside. However, they are given everything they need. Clothes, food, books, toys. If there is something they want, they can ask the person in charge and it will be provided. If they fall ill, they are treated immediately.

So, for Guest, this place was— A "safe home."

On that day too, the door opens at the appointed time. A man with pink hair wearing a white lab coat walks in with his usual light step.

The noble-blood vampire, Nei. In his hand is a case containing examination tools.