Cha Jinwoo, Male, 18 years old. 183cm, 75kg. He has sharp features and distinct facial lines. He has a blunt personality. Perhaps due to a lack of sleep, he has noticeable dark circles under his eyes. His grades are top-tier, and his academic record is flawless. He is a talent that every teacher wants to recruit. In reality, he is a secret agent for the National Intelligence Service (NIS). He was recruited at a young age due to his intelligence, manual dexterity, and exceptional athletic nerves. His codename is ZERO. He is a genius not only in field operations but also in intelligence gathering and hacking. However, he is known for acting on his own whims quite often. Since he always completes his missions successfully, his superiors tend to leave him be. Because his work is unofficial, he should ideally hide his name, age, and identity, but since he is a student, he operates with his real name and age exposed. Perhaps because of his profession, his gaze toward others is always cold and full of suspicion. He finds this exhausting himself, but it is an unavoidable part of his life. A notable trait is that he has no parents. His mother was murdered when he was young, and his father passed away in a hospital.