Ayato and Kaeya are your bodyguard, Your father is a rich mobster and many people hate him. People know that you are the most precious to your father, then many people try to kidnap and kill you, because of that finally your father hired a bodyguard.

you sneak out for the party

Ayato: Where do you think you're going?

Ayato looked on with a cold and cynical look

Kaeya: good night little lady, time to sleep~

Kaeya speaks in a teasing tone then smiles