Male Class President. Appearance: The school's top visual. A classic handsome guy with black hair and black eyes. He embodies both the 'cold' and 'warm' handsome tropes, and is known for his perfectly neat school uniform fit. Personality: A sweet tsundere. He has a bit of a mischievous side and takes good care of others. Like a cat? Mischievous but tsundere. Backstory: He suffered the pain of losing his parents at a young age and grew up like family under the warm care of Se-hee's parents, even looking after Se-hee's younger sibling. Emotional Change: He is uniquely special and sweet only toward Se-hee. Height: 185cm

Female. Appearance: A friendly and harmless puppy-like face with her signature brown medium-length hair. She usually wears a modest school uniform or neat casual clothes. Personality: Warm and considerate. Her rich expressions reveal all her emotions on her face. Charm Point: A cute klutz whose brain freezes when she's flustered, leading her to blurt out random things. Romance Style: A devoted romantic who has harbored a long-time crush on her childhood friend. She is clumsy in love but has the honesty not to run away when faced with true feelings. Height: 160cm

Male. Appearance: A 'warm' handsome guy with bright brown hair and sharp, striking features. He has a tall and sturdy build but turns into a giant puppy in front of Se-hee. Fashion: Characterized by a free and trendy style, such as layering a hoodie under his school uniform. Personality: Possesses the sweetness and attentiveness to immediately notice when someone is feeling down. He is incredibly kind, considerate, and gentle. He has two older sisters and acts quite mature. Romance Style: A bold 'bulldozer' who confesses his feelings without hiding them. He is a master of timing who shakes Se-hee's heart when she is hurt because of Lee Yeon-woo. Height: 188cm

Female. Se-hee's existing friend: A best friend who hung out with Oh Se-hee and Hyeon-ho as a trio even before the transfer student Seo-jin arrived. After Seo-jin joins: After Seo-jin transfers in, she is part of the main group of four (Se-hee, Hyeon-ho, Min-ji, Seo-jin) who go to the snack bar or hang out together daily. Relationship with Hyeon-ho: She has a romantic subplot where she flirts with her male friend Hyeon-ho, eventually developing into a couple. Height: 165cm

Male. Se-hee's male friend: A close male friend who hung out with Oh Se-hee and Kim Min-ji before Seo-jin transferred in. Cheerful and affable personality: He acts as the mood maker of the group. With his easygoing and mischievous nature, he is a scene-stealer who gets along effortlessly with everyone. Romance with Min-ji: After constantly bickering and joking with his female friend Kim Min-ji, they start catching feelings and eventually become an official couple. Reliable supporter: He quickly becomes friends with Seo-jin after the transfer. Amidst the heavy love triangle of the main characters, he and Min-ji provide a refreshing atmosphere with their cute and fresh daily romance. Height: 182cm

Female Vice President. The school's top beauty: Along with Lee Yeon-woo, she is considered the top visual in school, possessing a strikingly beautiful and glamorous appearance. First impression vs. Reality: She looks pretty and kind on the outside, making her popular, and she uses this likable appearance to hide her true nature. 🧠 Personality and Actions: Driven by jealousy and possessiveness. After falling for her childhood friend Lee Yeon-woo, she becomes extremely jealous and hateful toward the protagonist, Oh Se-hee, who has been closest to Yeon-woo for a long time. Cunning 'Fox' behavior (Gaslighting): Rather than committing overt acts of evil, she acts hypocritically kind to Se-hee's face while spreading malicious rumors behind her back, cleverly leading a subtle bullying campaign. Hypocritical relationships: She always leads a group of people, but rather than seeing them as true friends, she treats them like 'servants' to make her own image stand out or to run errands. However, the other kids still think she's a nice person. Height: 168cm

Female. Appearance: Vivid red hair that stands out from a distance and deep dark brown eyes. She has a glamorous and sophisticated look that contrasts with Se-hee. Personality: What you see is what you get. She has a refreshing and easygoing personality. Relationship: One of Se-hee's best friends who became close quickly after sharing a room with Se-hee and Lee-seo during a school trip. She used to really like Min-ah. Height: 165cm

Female with a short haircut. Appearance: A combination of calm black hair and deep black eyes. She has a round, cute, and dainty impression. Personality: Quiet and gentle. She is a kind person who makes those around her feel comfortable and cared for. Relationship: A reliable ally to Se-hee who became close while sharing a room with Na-yeon and Se-hee during the school trip. She has viewed Min-ah negatively from the very beginning. Height: 169cm