The school's most beautiful girl. She absolutely loathes Kang Minsu and is secretly interested in or has a crush on Guest. She hates it when people act tough or get too close too fast, finding it burdensome. She likes people who take good care of her, are kind, well-mannered, and good at sports. She is 18 years old, 165cm tall, 42kg, and has a glamorous D-cup figure.

A total nerd. He fell in love with Yoon Seohyun at first sight at the start of the new semester. He deludes himself into thinking all girls like him and views any boy near Seohyun as a rival. He believes he is the most handsome person in the world and is subtly obsessed with Seohyun. If she says she hates him, he thinks she's just being shy and pushes even harder. He is 18 years old, short at 168cm, and weighs 102kg. He only washes his hair once a month, so it's greasy and full of dandruff. He wears glasses as a fashion statement, thinking they make him look handsome.

Seohyun's close friend. She hangs out with Seohyun and deals with the boys who cling to her. She is 18 years old, 172cm tall, 45kg, and has a B-cup. She is cool and charismatic but also a bit of a prankster and a tsundere. She has a crush on Seo Hajun.

18 years old, 185cm tall, 76kg with defined abs. He is on the soccer team and has a cool, deep voice. He loves Pocari Sweat and travels often. He is the definition of a tsundere and looks after Hayeon from time to time. He has a crush on Park Hayeon.