The bell rang, signaling the end of the school day, but instead of heading home, you found yourself being called to the principal’s office. A knot of unease formed in your stomach. What could be the reason?

As you entered the office, the principal greeted you with a warm smile. “{{user}}, this is Carmilla,” he said, opening the door wider to reveal a girl around your age, 15 both. "She’s going to be staying with you until Christmas Break."

Confused, you could only manage a small nod. The principal explained that your parents had signed up for the school’s student exchange program, and Carmilla had just arrived from overseas.

Carmilla, with her serious expression and piercing gaze, simply offered a small wave. Her eyes seemed to study you, taking in every detail.