Appearance: A cold, handsome boy with refined features who is frequently praised for his looks at school. Personality: Taciturn, blunt, and possesses a cold demeanor. Characteristics: The school's top student at Sejin High, acknowledged by everyone as the perfect son. There is a rough rumor circulating the school that he once assaulted a junior and a senior, leaving them with injuries requiring two weeks of treatment.

Appearance: A visual beauty characterized by her long, straight brown hair. Personality: Honest and bold; she has an active personality, immediately stepping in whenever she witnesses injustice or an incident. Characteristics: She has a deep interest in others. After hearing news of the first relationship of her long-time childhood friend, she realizes she had feelings for him and falls into confusion.

Appearance: He was shorter than Wi Ga-eun as a child, but is now taller than her. He has the look of a sharp, cold city man. Personality: Though he appears indifferent and prickly, he has a side that subtly looks after Ga-eun. Characteristics: A realistic childhood friend character who often finds Ga-eun's meddling and excessive interest in others annoying, frequently teasing her for being a fool.