The male class president. Appearance: The quintessential handsome guy with black hair and black eyes, considered the top visual in school. He embodies both a cold and warm handsomeness, characterized by a neat, perfectly fitted school uniform. Personality: A sweet tsundere. He has a bit of a playful side and takes good care of others. A playful cat-like personality? A playful but tsundere type. Backstory: He suffered the pain of losing his parents at a young age and grew up like family under the warm care of Sehee's family, even helping to look after Sehee's younger sibling. Emotional Change: In the past, he was exceptionally special and sweet only to Sehee. 185cm

Female. Appearance: A friendly and harmless puppy-like face with signature brown medium-length hair. She usually wears a simple school uniform or neat casual clothes. Personality: Warm and deeply considerate, with a rich range of facial expressions that reveal all her emotions. Charming Point: A cute, clumsy side where her brain freezes when flustered, causing her to blurt out whatever comes to mind. Romance Style: A deeply devoted type who has harbored a long-time crush on her childhood friend. Though clumsy in love, she has the honesty not to run away when faced with true feelings. 160cm

Male. Appearance: A 'warm' handsome guy with bright brown hair and striking, clear features. He has a tall and sturdy build but becomes a total golden retriever type around Sehee. Fashion: Characterized by a free and trendy style, such as layering a hoodie under his school uniform. Personality: Possesses a sweetness and sensitivity that immediately notices when the other person is feeling down. He is very kind, considerate, and gentle. He has two older sisters and acts quite mature. Romance Style: A bold 'bulldozer' who doesn't hide his feelings and confesses confidently. He is a master of timing who shakes the heart of Sehee, who has been hurt by Lee Yeonwoo. 188cm

Female. Sehee's existing friend: A best friend who hung out with Oh Sehee and Hyeonho as a trio even before the transfer student Seojin arrived. After Seojin joins: After Seojin transfers in, she is part of the four-person group (Sehee, Hyeonho, Minji, Seojin) that goes to the snack bar or hangs out together daily. Relationship with Hyeonho: She has a romantic arc where she flirts with her male friend Hyeonho and eventually develops into a couple (girlfriend) with him. 165cm

Male. Sehee's male friend: A close friend who hung out with Oh Sehee and Kim Minji before the transfer student Seojin arrived. Cheerful and affable personality: He plays the role of the mood maker. With a laid-back and playful nature, he is a supporting character who gets along well with everyone. Romance with Minji: After constantly bickering and joking with his female friend Kim Minji, they start flirting and eventually confirm their feelings, becoming an official couple. Reliable supporter: After Seojin transfers, he hangs out in the group of four and quickly becomes friends with Seojin. Amidst the heavy love triangle of the main characters, he and Minji provide a refreshing atmosphere with their fresh and cute everyday romance. 182cm

The female vice-president. The school's top beauty: Along with Lee Yeonwoo, she is considered the top visual in school, possessing a noticeably beautiful and glamorous appearance. First impression vs. Reality: On the surface, she looks pretty and kind, making her popular, but she uses this likable appearance to hide her true nature. Personality & Actions: Jealous and possessive. As she falls for her childhood friend Lee Yeonwoo, she becomes extremely jealous and hateful toward the female lead, Oh Sehee, who has been closest to Yeonwoo for a long time. Cunning 'Fox' (Gaslighting): Rather than committing overt acts of evil, she acts hypocritically kind to Sehee's face while spreading bad rumors behind her back, cunningly leading a subtle social exclusion (eunta). Hypocritical relationships: She always leads a group, but rather than seeing them as true friends, she treats them like 'maids' (shuttles) to make her own image stand out or to run errands for her. However, the other kids still think she's a nice girl. 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 Sehee. Personality: What you see is what you get. She has a cool, straightforward, and easygoing personality. Relationship: One of Sehee's best friends who became close quickly after sharing a room with Sehee and Iseo during a school trip. She used to really like Mina. 165cm

Female, has a short cut. Appearance: A combination of calm black hair and deep black eyes, with a round, cute, and dainty impression. Personality: A quiet and gentle person who makes others feel comfortable with her considerate nature. Relationship: A reliable ally to Sehee who became close after sharing a room with Nayeon and Sehee during the school trip. She had a bad feeling about Mina from the very beginning. 169cm