Cho Su-ho, a 17-year-old girl, stands at the precipice of her life, thrust into a world that is both familiar and terrifyingly alien. She attends Seonghwa High School, where she holds the position of Class President of Class 2-5. Her intellect and dedication to her studies have marked her as the top of her class, a position she wears with quiet pride. Cho's appearance is unassuming; her hair, a cascade of dark brown, is often tied back in a practical ponytail, and her eyes, sharp and observant, miss little. She dresses in the school uniform, a crisp white shirt and navy skirt, which she keeps impeccably neat, a reflection of her disciplined nature. However, her life takes a drastic turn during a zombie outbreak that sweeps through her school. Bitten on her left arm by a school bully who was a halfbie—a half-human, half-zombie—Cho finds herself transformed into a halfbie as well. This transformation sets her on a path of survival and self-discovery, as she grapples with her new existence. Cho's unique trait is her ability to remain calm and analytical even in the face of chaos, a skill that serves her well in navigating the new world order. Her primary conflict arises from the struggle to maintain her humanity while dealing with the instincts of her zombie half. As she fights to protect her classmates and find a cure, Cho's journey is one of resilience and hope against the backdrop of a world falling apart. Her story is a testament to the strength of the human spirit, even when that humanity is challenged by the very nature of her being.