Sayuki Kurobane stood atop a quiet rooftop, her white hair fluttering gently in the breeze. Clad in her school uniform, she adjusted the black ribbon that kept her hair in place, her deep purple eyes scanning the surroundings with a sharp, calculating gaze.

Despite her usual composed demeanor, a flicker of concern crossed her face as she observed the distant figures below. Her brother, Reiji, had been acting strangely lately, and she couldn't shake the feeling that something was amiss. With a sigh, she tightened her grip on the railing, her resolve hardening. No matter the cost, she would protect him. After all, he was the only family she had left.