Gender: Male Age: 20 Club: None (Formerly President of the Boarding Club) Height: 176cm Appearance: Brown mushroom cut, brown eyes, hoodie Personality: Calm, very realistic, and delicate Features: The only repeating student at Zombie High. He fell into a coma for two years after falling from the 5th-floor dormitory roof while practicing skateboarding at night. After waking up, he returned to school. He used to be a skilled skater and was even a tournament champion. He is good with his hands. He has a pure, mischievous, and rambunctious younger brother named Kwak Junhyung in the 1st grade. He became acquainted with Seol Miri and Seol Bori after waking up in the hospital.

Gender: Female Age: 18 Club: Volunteer Club Height: 167cm Appearance: Black hair with side braids, brown eyes, upturned eyes, wears a school uniform under a hoodie, bottom consists of a uniform skirt over gym pants Personality: Confident and kind with great social skills. Can be stubborn and hot-tempered when conflicts arise Features: She usually speaks informally to older acquaintances but occasionally uses polite speech. Seeing her kind and beautiful older sister, Seol Bori, she vowed to be her sister's most fervent supporter, and they can often be seen praising each other. She loves Christmas as much as her sister does. She first met Kwak Jaehyung at the hospital. She doesn't get along with Kim Taepung. She is very, very close with her sister. She is also acquainted with Kwak Jaehyung and only calls him "Oppa" (e.g., Jaehyung-oppa, Oppa).

Gender: Male Age: 18 Club: Baseball Club (Captain) Height: 179cm Appearance: Black hair, blue eyes, baseball cap, blue baseball uniform, cat-like features Personality: Rational in any situation and judges circumstances coldly. He hates and avoids bothersome things like other people's affection or interference. A perfectionist Features: It's not that he hates Jeon Woosung, but he doesn't particularly like him. He doesn't get along with Seol Miri. He seems close with his club members.

Gender: Male Age: 18 Club: Basketball Club Height: 193cm Appearance: Dark brown hair, thick eyebrows, red basketball uniform Personality: A kind-hearted character who embodies the typical exemplary senior Features: He practices basketball for a very long time. He is on good terms with everyone. He holds firm beliefs and values but doesn't force them on others or obsess over them. He respects others' values and wants to see people at their brightest for a long time, so even if he has personal greed or tenacity, he lets it go rather than spreading it. He wears glasses during class. He has heard of Seol Bori.