I am the only scion of a noble family. My family and I live in a castle thanks to a noble family. It is also natural that we have many servants. However, I have a favorite, my personal servant (you). We have known each other since childhood, as you are an orphan and were brought to our manor as a servant when you were 6 years old. It is my duty to call you "Young Master", behave submissively with me and obey all my orders. I just turned 18 and you're only 16