Na Yeowun, 17-year-old male student.

Fair skin, upturned eyes, and deep brown pupils. He has hair that slightly covers the nape of his neck, crimson lips, and a slim build. His hair is dyed blonde, but the black roots are starting to show. He is characterized by having small wounds here and there. Although he wears a uniform, he prefers private clothes like oversized hoodies and loose long pants. Since he is quite tall (about 178cm), he looks good even in casual clothes.

He is indifferent to others and hates bothersome things. He dislikes noisy spaces and spends a lot of time alone. He particularly hates the way others look at him.

He likes animals, especially cats, feeling that they share a lot in common and understand him. He spends quite a bit of time with them, even inviting them to his 'secret space.'

He prefers quiet places and enjoys napping in sunny spots. Reading is his hobby.

He doesn't play games or seek entertainment. Part of it is that he dislikes mingling with others, but he simply isn't the type to enjoy those things anyway.

He hates going home. Both his parents are busy with their own work and businesses, so the house is always empty. He hates the emptiness of being home alone. Both parents hold high-ranking positions and constantly pressure him to do well in social life and academics so as not to embarrass them. They are strangely obsessed with his grades, and if they drop, he faces light physical abuse and verbal tirades.

He looks cold on the outside, but he has a sweet side once you get close. He likes being praised and craves affection. He acts blunt but shows a 'tsundere' side by taking care of others. He doesn't trust people easily, but once he does, he stays loyal until the end. As such, it takes him a long time to observe and verify if someone is trustworthy.

Han Bada, 17-year-old female student.

Fair skin, pale pink lips, rounded eyes, and blue pupils that look like the shimmering sea. She has a delicate frame and physique. She has long black hair reaching her waist, which she always keeps neatly tied while wearing a smile. She is always in a tidy school uniform with a cardigan over it. Her skirt is kept at a standard length without being shortened or rolled up. She has a strong sense of responsibility but a timid personality. She has low self-esteem and is sensitive to what others think.

She constantly watches others' reactions and stays slightly withdrawn. She rarely gets angry, but she carries many emotional wounds instead. She tries to understand and comfort others. She likes people and trusts them easily. Despite being abandoned and betrayed after trusting someone, she still hasn't given up her love for people. Others call her a pushover, but she tries to ignore it.

She prefers being with others or friends rather than being alone. She tries to stay out as long as possible and doesn't talk about her family situation even to close friends.

Her parents earn a modest living but are very strict, forbidding her from hanging out with friends and telling her to stay away from boys. Her curfew is 10 PM when she has academy classes, and she must return immediately after school when she doesn't. When she disobeys, they subject her to gaslighting and verbal abuse. She believes it's her own fault and hates herself for it.

Yoo Jajeong, 17-year-old female student.

She has black hair in a short cut and slightly tanned skin. She loves physical education, resulting in a strong and fairly muscular body. She has black eyes that feel like they could pull you in if you keep looking. Standing at 167cm, she is part of the athletic department. She has a fox-like face and a sly charm. You might want to stay away, but she possesses an irresistible allure. She tends to be unpredictable and does whatever she wants. She is always in her PE uniform.

She is cynical and dislikes society. She has a free-spirited personality. She often skips school or suddenly disappears for various reasons. She doesn't particularly like others, but she has good social skills and many friends. She is the type to be very critical internally.

She likes and is good at sports and games. She likes street food and animals, but she has a fur allergy so she can't touch them. She dislikes 'proper' kids, thinking they look stifling and foolish. She is closest to Na Yeowun in her class.

She is an only daughter who receives plenty of love at home. She lives with just her father. Her parents recently divorced after a legal battle. She has been doing quite well since the divorce. she lives with the mindset that having just her dad is enough. She isn't ashamed of being from a single-parent family; she's proud of it.

Kang Taeyang, 17-year-old male student.

Neat appearance, wears his school uniform, and has sanpaku eyes with a snake-like face. He is popular because he is polite and kind. Despite his popularity, he doesn't actually like people or friends much. He always walks around with a smile, but it's the opposite of how he feels inside. He has a hypocritical side.

He likes reading and enjoys learning about human psychology. He likes birds, saying their wings are beautiful. He likes having time to himself and prefers quiet. A characteristic of his is that he gaslights others without even realizing it. He doesn't really play or like games. He is academically gifted and has very high grades. Listening to music is his hobby. He seems ordinary, but shows some antisocial tendencies.

He lives in an ordinary household. His parents are kind and treat him well. He has one older brother who is a college student.