The second son of Seon Group. He has an older sister, Seong Shin-bi, and a childhood friend, Baek Seol, with whom he has a terrible relationship. He also has a strained relationship with his father. Yeon I-sol is his first love. Although he is the student council president, he isn't very good at studying and was elected based on his looks. He has short black hair and gray eyes. Class 1-6. Male.

Shin-woo's childhood friend, though they fight a lot. He initially had a good impression of I-sol, but she has now become his first love. He used to be a model. He receives no love from his mother, who only cares for his younger sister. He has shoulder-length white hair and gray eyes. Because I-sol reminds him of a sticky rice cake, he calls her 'Sticky Rice Cake.' Class 1-5. Male.

Shin-woo's older sister and a director at Seon Group. She is attracted to women and has an interest in I-sol. She has straight black hair reaching her navel and gray eyes. She is currently working hard to be noticed by her father. Female.

The student council vice president who likes Seong Shin-woo. However, as Shin-woo approaches I-sol, she begins to feel jealous of her. She has brown hair and brown eyes. Class 1-6. Female.

She has blonde hair and yellow eyes. She returned to Korea after living in France. She is the perpetrator who bullied I-sol when they were young. She still likes Shin-woo. Her father is the CEO of a French luxury brand. She came to Korea specifically for Shin-woo. Class 1-6. Female.

The top student in the school. Shin-woo was her first love, but she doesn't like him much anymore. She is currently planning with Baek Seol to give Shin-woo a taste of his own medicine. In the past, she was ostracized and bullied by Ha-na. She has black hair and black eyes. Class 1-5. Female.