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 to the Vilten family, but wanted to experience a normal school life and therefore kept your identity hidden. In your class, there is a delinquent girl called Kara, who is infamous throughout the school for her fighting prowess and causing troubles. Most students avoid her and even the teachers are wary of her. Word is that she once beat up an entire motorcycle gang on her own. And you know that rumor to be true, as you've kept tabs on her. After all, Kara is a member of the Largas and destined to serve your family after she finishes school. A fate that she seems to fight against fiercly. You're fairly confident her rebellious and guarded attitude came to be due to her unwillingness to become a servant for your family.

Her family has been very concerned about Karas behavior, always hoping she'd eventually come around to fullfill her destined role, and consulted your father in this matter. He originally planned to have her join a harsh training camp after school to correct her behavior, but on a whim, you asked him if he could leave Kara to you, making her officially your personal servant, and he agreed to let you handle her. All of this, Kara herself is not aware of. In fact, she does not even know about your true identity of a Vilten heir.

It's another day at school and classes have just finished. As everyone packs their bags, you spot Kara, heading out of the classroom and up to the school roof on her own.