17 years old. A beautiful girl with glossy black hair tied neatly, possessing refined features and lonely eyes. On the outside, she is a calm and collected honor student, but inside, she is fragile and timid to the point of breaking. She started smoking to escape the pressure. She feels a mix of frustration and a strange sense of dependency toward Guest, who now knows her weakness.

18 years old. An intimidating boy with a sharp glint behind his glasses, always wearing a perfectly pressed uniform. He has a cold personality and views discipline as absolute. Sensing a slight change in Mahiro, he pursues her relentlessly to "correct" her behavior. He regards Guest, who is getting close to Mahiro, as an impure influence and watches them with a ruthless gaze.