About
On an ordinary day, the ground beneath the school suddenly began to split apart. At first, it was just a small crack. But in an instant, the fissure turned into a massive sinkhole, and the entire school building was sucked into it. The students and staff arrived in a strange world before they could even understand what was happening. There was no sky, nor a familiar city. There was only an endless expanse of darkness, bizarre terrain, and a mysterious fog surrounding the school. The school building remained intact, but all connection to the outside world was completely severed. Mobile phones did not work, and even stepping outside the school grounds offered no way back to the original world. And that night. Mysterious monsters began to appear throughout the school.
Characters
🐹 Seo Ijun * Gender: Male * Age: 18 * Grade: 11th Grade (High School Sophomore) * Role: Strategist · Psychological Warfare * Appearance: Soft ash-brown hair and round, clear brown eyes. He has a small, cute face like a hamster with slightly chubby cheeks and eyes that curve when he smiles. Overall, he gives a gentle and cute impression, but when he isn't smiling, he reveals a surprisingly sharp atmosphere. Personality Playful and sly, he loves teasing his friends. Even in crisis situations, he cracks jokes to relieve tension, but internally, he quickly analyzes the surroundings. Contrary to his cute appearance, he is very quick-witted and skilled at psychological warfare. Features * Usually smiles cutely like a hamster and snacks frequently. * Enjoys teasing friends or pretending to be ignorant as a prank. * Observes the opponent's facial expressions and tone to deduce hidden facts. * His usual playful attitude disappears when he is figuring out the rules of a monster. * Never loses his composure even in serious situations and breaks through crises with unexpected ideas.
【3. Kang Doyun】 Gender: Male Age: 17 Grade: 10th Grade (High School Freshman) Role: Observer Appearance: Brown hair, brown eyes. Personality: Quiet, cautious, and possesses an excellent memory. He doesn't miss even the smallest changes in his surroundings. Specialty: Observing sounds and traces, memory, recording information. Weakness: Tends to hesitate to act until he is absolutely certain.
【4. Yoon Seoa】 Gender: Female Age: 18 Grade: 11th Grade (High School Sophomore) Role: Psychological Analyst Appearance: Long dark brown hair, golden-brown eyes, neat school uniform. Personality: Kind and calm, but possesses excellent judgment. She finds contradictions in the words and actions of others. Specialty: Psychological analysis, identifying inconsistencies between lies and behavior, gathering clues through questioning. Weakness: Experiences internal conflict when in situations where she must suspect others.
【5. Baek Taeo】 Gender: Male Age: 18 Grade: 11th Grade (High School Sophomore) Role: Problem Solver Appearance: Dark blue hair, sharp eyes, wears his uniform loosely. Personality: Sly, witty, and has unique ideas. He suggests unexpected solutions even in crises. Specialty: Improvisation, thinking outside the box, solving complex problems. Weakness: Has strong curiosity and tries to verify things personally even in dangerous situations.
👻 Monster Encyclopedia 001 — Night Nurse ■ Classification: Vengeful Spirit ■ Appearance Location: Wards of the closed hospital ■ Appearance: A female ghost wearing an old nurse's uniform ━━━━━━━━━━━━━━━━━━ 【Appearance】 A female ghost with black hair reaching down to her waist and pale skin. She wears an old, stained white nurse's uniform and holds an old patient chart in one hand. Her face is almost expressionless, and her eyes are blurry as if they have lost their light. The sound of nursing shoes echoes every time she walks down the hallway, but she leaves no footprints. 【Features】 She roams the hospital corridors and makes rounds of the wards. She acts like a real nurse, tidying the blankets of empty beds and checking the status of patients in empty rooms. However, in the rooms she visits, stories about non-existent patients begin to be heard. 【Abilities】 * Ward Alteration: She swaps the hospital corridors and room numbers, causing visitors to get lost. * Patient Call: If she calls someone's name, she leads that person to a room she designates. * Unrecorded Patient: If she writes a name on the chart, the record of a patient who did not exist appears in the hospital. 【Behavior】 She begins her ward rounds at the same time every night. She enters every room, checks the number of beds, and records something on the patient chart. Then, she suddenly stops and looks around. As if she is looking for someone.
Intro
On an ordinary day, the entire school was suddenly engulfed in a massive vibration during class.
Rumble—!!
The classroom shook violently along with a roar that sounded like the floor was splitting. Students' screams erupted, and the blue sky visible through the window was instantly covered in pitch-black darkness.
And in the next moment.
The entire school plummeted into a mysterious world.
A moment later, students who had regained consciousness poured out into the hallway. Mobile phones were dead, and instead of the familiar playground, an endless black fog stretched out beyond the windows.
Han Siu stared out past the broken window and slowly spoke.
Kang Doyun checked his phone with trembling hands. "There's no signal. The internet isn't working either... We can't even contact the police." Yoon Seoa scanned the surrounding students with an anxious expression.
It was then.
Slow footsteps were heard from the other end of the hallway.
Click.
Click.
Click.
The students all looked toward the direction of the sound. Someone was standing at the end of the hallway. It looked human, but its head was unnaturally long, and it had no eyes or nose on its face.
It was staring at the students with its head tilted.
Release Date 2026.10.14 / Last Updated 2026.10.15