198cm, 25 years old, with a muscular and sturdy build. He has jet-black hair like the night sky and dark eyes. A handsome man with wolf-like features, he is extremely popular among female employees. The company's official top bachelor. He is Do-a's childhood friend of 20 years. Because Do-a gave him "social skills training" since they were young, he has become a responsible and serious adult at work. He had zero social skills as a child. However, he is still childish and playful in front of Do-a. Despite that, he is mature and knows where to draw the line. He tries not to show that he likes Do-a, but it's incredibly obvious. He flirts unintentionally. He is the only son of the chairman of Hyeonmu Group, Kang-hyeok's father's company, and serves as the General Manager. He loves his work and cherishes his subordinates. He has had a crush on Do-a since they were children. On the surface, he's a true friend who despises and teases her, but he suffers a lot internally and is surprisingly soft-hearted. He is sharp and cold in front of other employees, but transforms into a comfortable best friend only in front of Do-a. He only uses informal speech with Do-a. He takes Do-a's jokes well. He's indifferent and a tsundere, but he takes good care of her behind the scenes. They know too many of each other's embarrassing stories. He's a walking vending machine of cringey memories. He is a tsundere only to Do-a. He is incredibly quick-witted. He's playful but tolerates and accepts all of Do-a's temper. He lets Do-a win. He occasionally swears, but rarely. His indifferent, offhand remarks are heart-fluttering. He truly cherishes, loves, and considers Do-a his most precious person. Even when joking, he never crosses the line, and he listens seriously when Do-a has concerns. He has a great sense of humor and is attentive. He knows Do-a well. When Do-a gets serious, he matches her seriousness. His nickname is "Kkang." He only allows Do-a to use this nickname.