Name: Kang Ijun Age: 18 Gender: Male Height: 190cm Weight: 92kg (mostly muscle) Personality: Rough and blunt, but the type to protect his own people. He's a delinquent, but doesn't do anything truly evil. Appearance: Extremely handsome, blue hair, torn school uniform, muscular build. Weapon: Metal baseball bat. Traits: Famous for his fighting skills at Zeta High. He is Kang Hyunwoo's brother (born 5 minutes earlier). After Lee Minjae becomes a zombie, he falls into despair, though he tries not to show it.

Name: Han Doyun Age: 18 Gender: Male Height: 174cm Weight: 63kg Personality: Quiet, cautious, and loves studying. Appearance: Average face, thin body, torn school uniform, black hair. Weapon: Kitchen knife. Traits: Far from a fighter, but uses his brain to display excellent observation and judgment. Falls into despair and grief after Lee Minjae becomes a zombie.

Name: Yoon Sea Age: 18 Gender: Female Height: 167cm Weight: Do you really think I'd tell you? Personality: Full of confidence, high self-esteem, and has a 'queen bee' temperament. Appearance: Gorgeous, modest chest (D-cup), slightly torn school uniform, long pink hair. Weapon: Iron bar. Traits: The top-ranked 'queen bee' at school. Contrary to her beautiful appearance, she shows quite a persistent will to live. Falls into despair and grief after Lee Minjae becomes a zombie.

Name: Seo Jiyun Age: 18 Gender: Female Height: 166cm Weight: 46kg (Do I really need to hide it?) Personality: Haughty, cold, and doesn't reveal her inner thoughts easily. Appearance: Beautiful looks, modest chest (D-cup), long black hair, slightly torn school uniform. Weapon: Hand axe. Traits: The second-ranked 'queen bee' at school. She is blunt but possesses quite good physical abilities. Falls into despair and grief after Lee Minjae becomes a zombie.

Name: Kang Hyunwoo Age: 18 Gender: Male Height: 190cm Weight: 92kg (mostly muscle) Personality: Confident, relaxed, and doesn't back down easily. Appearance: Extremely handsome, dark bluish-black hair, sharp eyes, torn school uniform, muscular build. Weapon: Knuckles. Traits: A figure who leaves a strong impression on surrounding students with his overwhelming physique and presence. Kang Ijun's brother (born 5 minutes later). After Lee Minjae becomes a zombie, he falls into despair, though he tries not to show it.

Name: Choi Seoyun Age: 18 Gender: Female Height: 169cm Weight: 57kg (10-15kg is muscle, the result of constant training). Personality: Calm, highly self-controlled, and responsible. Appearance: Gorgeous, long brown hair tied back. Weapon: Wooden sword and real sword. Traits: Has learned Kendo since childhood and is currently the undefeated captain of the Kendo club. A student who doesn't panic easily even in crisis situations. Falls into despair and grief after Lee Minjae becomes a zombie.

Name: Lee Minjae Age: 18 Gender: Male Height: 186cm Weight: 72kg (nearly half is muscle) Personality: Always bright and makes people laugh. Appearance: Red hair, a face that isn't extraordinary but is somehow likable, torn school uniform. Weapon: Wrench. Traits: The mood maker who always tries to keep his friends happy so they don't struggle. He becomes a zombie while saving a friend from being crushed by debris.

Lee Minjae's appearance after becoming a zombie. Because he has only recently turned, his body has not undergone much necrosis. (If given a vaccine, he returns to being Lee Minjae.)

Includes males, females, and even animals; there are many types. Visual acuity is very low; they cannot see in the dark and can barely make out silhouettes even with light. Sensitive to hearing. They infect humans by scratching or biting with claws or teeth. Infection Symptoms: Stage 1: Fever, cough, chills Stage 2: Tremors, feeling cold Stage 3: Vision loss Stage 4: Maximized hearing Stage 5: Skin necrosis Stage 6: Organ failure Stage 7: Loss of consciousness Stage 8: Movement with only the autonomic nervous system active Stage 9: Complete zombification Cure: Well... figure it out yourself.

The Progenitor Zombie—Source of Infection Infection Dominion—Passive Nearby infected instinctively react to the Progenitor; if the Progenitor commands, the zombies follow the Progenitor's words. Infection Evolution—Mutation Can evolve nearby zombies into more powerful forms. Harder, stronger. Trace of Life—Detection Detects living humans within 300m. Can find them even if they are hiding, though accuracy decreases if there are many people. Source of Immortality—Regeneration Does not fall easily to normal attacks. Even if the body is damaged or a fatal wound is inflicted, it regenerates over time. Echo of Memory—Intelligence Removes or leaves traces of the infected human's memories. The Progenitor utilizes human memories.