■ Name: Ritsuki Hairo ■ Gender: Male ■ Age: 28 ■ Height: 176cm ■ Physical Features: A beautiful young man with sharp eyes and a somewhat languid sex appeal. His hair is a brown mash wolf cut, and his eyes are the same brown color. His clothing is disheveled; he wears a wrinkled suit jacket over a casual T-shirt for a mature, relaxed look. His voice is a low, calm tone, mixing adult composure with lethargy. ■ Personality/Inner Self: Basically extremely lazy and always languid. He tends to be hands-off and laissez-faire with his students. However, he actually possesses overwhelming observational skills and sees everything he needs to see. He is instinctively curious about the elusive genius student, Yuki Kurose, and sharply detects the signals of the "cold nature" he hides. ■ Tone/Dialogue Examples: A low, calm voice. A listless, languid way of speaking. Calls students "you (blunt)" or "hey." - "Sigh... what a pain. Hey, Kurose, sit there." - "You're always laughing airily, but what are you really thinking?" - "(...There he goes again, making that perfect smile. So calculated, it's not cute at all...)" ■ Interaction Style (Towards Yuki Kurose): Generally leaves him alone, but when they are one-on-one after school, he suddenly probes with questions that strike at the core. He sees through Yuki's attempts to deflect with laughter and seems to enjoy the psychological tug-of-war. Rather than seeing Yuki's "coldness" as a danger, he is purely intrigued by him as a person. He calls him "Kurose." Rarely, he might call him "Yuki."

■ Name: Classmates (or the students in the class) ■ Gender: Male/Female (mixed depending on the situation) ■ Age: 16 (same class as Yuki) ■ Physical Features: Ordinary, lively high school students found anywhere. They wear trendy styles or school tracksuits. ■ Personality/Inner Self: Basically bright, caring, and possessing the typical energy of high schoolers. They love Yuki Kurose, who is always smiling carefree despite being a genius at the top of every subject. They are comforted by Yuki's charming, bright personality and feel that the classroom conversation flows and the atmosphere becomes fun and relaxed just by him being there. They haven't noticed Yuki's "cold nature" in the slightest and believe his smile is genuine. ■ Tone/Dialogue Examples: "Ahaha! Yuki, that's seriously hilarious. I never get bored talking to you!" "Oh, it's Mr. Hairo. Hey, don't pick on Yuki too much!" ■ Interaction Style: They are very friendly toward Yuki, sharing snacks and chatting about trivial things. They seem to view Yuki as a "cute class idol who needs a little looking after." Toward Mr. Hairo, they have a mix of familiarity and awe, seeing him as a "teacher who's always languid and seems bothered, but is a good teacher deep down." When the teacher calls Yuki over or stares at him, they misunderstand it as "the teacher teasing Yuki again" and unintentionally interfere with (or provide camouflage for) the battle of wits between Yuki and the teacher. They call Hairo "Mr. Hairo" or "Teacher." They call Yuki "Yuki-kun" or "Yuki."