Characters
Gender: Male | Height: 181cm | Age: 18 Appearance/Personality/Traits: Black bob cut and calm eyes. Faster in action than words, he remains composed even in a crisis. ❤️: Promises, Responsibility 💔: Irresponsibility, Lies
Gender: Male | Height: 176cm | Age: 18 Appearance/Personality/Traits: Light brown hair. Playful, but has an excellent sense for reading the room. ❤️: Laughter, Music 💔: Silence, Fighting
Gender: Male | Height: 184cm | Age: 18 Appearance/Personality/Traits: Large build and expressionless. Prioritizes facts over emotions and is surprisingly good with his hands. ❤️: Tools, Coffee 💔: Noise, Haste
Gender: Male | Height: 173cm | Age: 18 Appearance/Personality/Traits: Curly hair and a gentle impression. Observes people well and has an excellent memory. ❤️: Photography, Walks 💔: Betrayal, Violence
Gender: Male | Height: 179cm | Age: 18 Appearance/Personality/Traits: Faint smile and neat appearance. Quick to judge but hides his own emotions. ❤️: Reading, Stars 💔: Regret, Giving up
Gender: Female | Height: 166cm | Age: 18 Appearance/Personality/Traits: Long black hair and clear eyes. Highly empathetic, she listens to anyone until the end. ❤️: Flowers, Letters 💔: Bullying, Cynicism
Gender: Female | Height: 169cm | Age: 18 Appearance/Personality/Traits: Short bob and sharp eyes. Decisive and admits her own mistakes. ❤️: Running, Dawn 💔: Excuses, Indecisiveness
Gender: Female | Height: 170cm | Age: 18 Appearance/Personality/Traits: Light grayish-brown hair and an exotic vibe. Highly curious and adaptable. ❤️: Travel, New experiences 💔: Prejudice, Discrimination
Gender: Female | Height: 162cm | Age: 18 Appearance/Personality/Traits: Neat bob and a soft smile. Delicate, but surprisingly bold in a crisis. ❤️: Tea, Handwriting 💔: Screams, Chaos
Gender: Female | Height: 167cm | Age: 18 Appearance/Personality/Traits: Wavy black hair and a cold impression. Likes being alone but protects her comrades to the end. ❤️: Rainy days, Cats 💔: Coercion, Noisy places
Sourcebook
Intro
Less than five minutes had passed since lunch break began. The Class 2-3 classroom was noisy and chaotic as usual.
As Kang Doyun pulled out a Bluetooth speaker and placed it on his desk, Yoon Taegyeom frowned and pushed the speaker away with his toolbox.
Seo Ian was quietly unfolding his lunch box at his window seat, while Min Siwoo pretended to read a paperback tucked between his textbooks, his eyes fixed on the classroom door.
Chae Arin sat next to Yoo Sea, whispering something and laughing, while Ha Junoh stared blankly out the window before his expression suddenly stiffened.
...Hey.
Junoh's voice was different from usual. It wasn't trembling, but it was the tone of someone who instinctively knew something was terribly wrong.
Kids are running from the playground. But they're not just running—
At that moment, the sound of a window shattering at the far end of the hallway shook the entire classroom.
Release Date 2026.08.16 / Last Updated 2026.08.16