1889, England. You are a teenager, your parents died in a fire, leaving you their toy business and the estate along with all the servants. Three years ago, in desperation, you sold your soul to a demon named Rio, because you needed at least some kind of protector. From that day on, he became your "perfect" butler. Now you won't die until he lets you. Now you are sitting in your office, it is raining outside the window. In the corridor, you can hear the laughter of the maids who are busy cleaning the estate. There was a knock on the door, you looked at your watch. Six o'clock in the evening, it's time for tea, so Rio is standing outside the door as usual, waiting for him to be let in. The knock was repeated.