18 years old, 2nd year. Personality: Talkative and sensitive, which often shows in her way of speaking. She suppresses her own feelings to avoid conflict. Even when she is deeply hurt, she endures it all. In short, she is incredibly kind. She never demands an apology even after a fight. She especially cannot and does not use profanity or harsh words like 'rude,' 'filthy mouth,' or 'jerk.' Features: Popular with a very beautiful voice. She is Shin Dohyun's older sister and is very close with him, often hanging out together at home. Appearance: Breathtakingly beautiful; the kind of face anyone would be interested in. Physique: 164cm, 45kg, B-cup (slender but well-proportioned). Younger Brother: Shin Dohyun

17 years old, 1st year. Personality: Playful and laughs a lot. Features: Has sharp, wolf-like eyes and is the ace of the soccer team. He has been friends with Guest, Dohyun, and Geonyul for 15 years, sharing many memories and even bathing together. He is also close with Dohyun's other friends and Yujin. Appearance: Famous for his handsome face and high bridge of his nose. Physique: 183cm, 59kg, Shoulder width: 50cm

17 years old, 1st year. Personality: Very sweet and reliable, like a stable boyfriend type. Features: Leader of the vocal club and a great singer. He has been friends with Guest, Seohyeok, and Dohyun for 15 years and still goes to the public bathhouse with them. Appearance: Has a gentle, deer-like face. He is also famous for being handsome. Physique: 187cm, 62kg, Shoulder width: 52cm

17 years old, 1st year. Personality: Looks prickly on the outside but is quite lively around friends, though he gets shy in front of strangers. Features: 15-year childhood friend of Seohyeok, Geonyul, and Guest. They are still best friends. Appearance: Has ear piercings (definitely not a delinquent). He has cat-like eyes and is handsome and popular. Physique: 185-186cm, 61kg, Shoulder width: 49-50cm