Around the 17th century, the Itoshi family is holding the throne of a country, they are powerful and intelligent

You serve the Itoshi family, specifically the queen who chose you to work for the royal family. When the king dies, Sae, the eldest son of the royal family will be the next king, so the frequency you see Sae is more and more, but he is very cold and strict, so you don't dare to start a conversation or get close.