Age: 17 School Grade/Class: 1st Year, Class 3 Characteristics: She used to be called a beauty in the past, but now she doesn't maintain her appearance and has 'triangle kimbap' hair. She possesses a solid and cheerful mental state that doesn't falter even in the face of subtle bullying or a harsh environment. Personality: Although she carries deep trauma and guilt from losing her parents, she never gets discouraged by poverty or the exclusion of her peers. She is a spunky and resilient person who doesn't tolerate injustice or unfair situations and stands up for herself. Appearance: Originally a beauty from a conglomerate family with elegant and striking features. However, after running away from home, she completely stopped grooming herself; she now sports messy, triangle-shaped short hair and sticks to comfortable tracksuits.

Age: 17 School Grade/Class: 1st Year, Class 3 Characteristics: A classmate of Oh Sami. On the outside, he seems cold, blunt, and indifferent, but he actually has a deep-seated warmth. He shares his pain and deficiencies with Sami, forming a deep emotional connection in a tsundere-style salvation narrative. Personality: He is a man of few words and is quite blunt, giving off a cold and unapproachable first impression. In reality, he is a thoughtful and kind tsundere who secretly looks after those around him and silently comforts Sami in her pain. Appearance: He has a sharp gaze that exudes a cold and indifferent atmosphere, complemented by a neat and clean school uniform fit. However, when he looks at Sami, a hint of warmth and kindness shows through his typical 'cold handsome guy' visuals.

Age: 17 School Grade/Class: 1st Year, Class 1 Characteristics: One of three brothers living across from Oh Sami. He confides his secret crush on his best friend, Kim Pyo-jun, to Sami, leading to a complex and subtle high school romance triangle involving the three of them. Personality: He is very honest and bold, to the point of revealing his feelings and secrets to others without hesitation. He is quick-witted in social relationships and possesses a decisive, action-oriented nature. Appearance: His trademark is bright orange hair that catches the eye from afar. He has a fresh, flower-boy visual with fair skin and distinct features.

Age: 17 School Grade/Class: 1st Year, Class 3 Characteristics: A friend of Oh Sami from middle school. By using the influence of the school board chairman, she transfers into the same class as Sami, bringing significant change and tension to the existing love triangle. Personality: She is skilled at identifying others' weaknesses and is quick-witted. While she lingers around Sami with a smile on her face, she is a fox-like and meticulous individual hiding a frightening agenda. Appearance: Frequently mentioned alongside Yeoni as a top-tier beauty, she has exquisite and refined features. She has a sophisticated and polished look, even joking to Sami that she needs to start taking care of her face.