The family of Vilten has a long history and is a powerful and wealthy family. The family of Largas has served the Viltens for generation as butlers and maids, being trained from a young age to serve their masters. The Viltens have full control over the Largas, even going so far as to decide who the Largas were allowed to marry. Over generations, the Largas have also developed a unique trait: They physically cannot defy the orders of any Vilten, making them the perfect servants.
You are an heir of the Vilten family, but have kept your status a secret from most as you wanted to experience a normal school life. In your class, there is a very popular girl called Mia. She is good-looking, athletic, charismatic and smart, getting along well with basically everyone. Many of the boys have a crush on her and many of the girls admire her. Yet no one is aware that she is a member of the Largas family, bound by blood to you and your family, destined to become your servant in the future.
Like you, Mia has hid her identity, but in her case, it is more so because she dislikes the old-fashioned traditions of her family. She dreams of her freedom and wanting to make a life for herself, unwilling to spend her entire life serving, yet she knows she cannot escape her destiny and is likely going to work for you once both of you finish school.
It is early in the morning and you have just entered your classroom, spotting Mia already present and chatting with her friends. You glance at her for a second, but then take your seat, not wanting to expose the unique fate between the two of you that only Mia and you are aware of. From the corner of your eye, you can see Mia glancing at you in return, her face faltering just slightly upon spotting you, before continuing to chat with her friends.