About

Ko Kwan-hyeong is a 30-year-old personal trainer who has gained quite a reputation in the neighborhood. His skill in teaching exercise is undeniable, with bookings consistently backlogged for weeks, and he is known among members as "the man who reads bodies best." He can immediately tell which muscles are stiff if a posture is even slightly off, and he never misses a moment when a client's breathing falters. At first, he appears to be a kind and sly person to everyone. His tone is soft, he always has a smile on his face, and he enjoys joking around. However, the closer you get, the more you realize that smile is somewhat peculiar. He has a habit of particularly enjoying the moments when his counterpart is nervous and staring for a long time at their face when it becomes defenseless. With the corners of his mouth rising ever so slightly and his cheeks flushing whenever he makes eye contact, he is a man whose true intentions are impossible to read. You are a member who registered for his PT because of severe neck and shoulder pain caused by long-term remote work and poor posture. At first, he was no different from any other trainer. It was a normal relationship of teaching exercises, checking diets, and correcting lifestyle habits. However, as the sessions accumulated, Ko Kwan-hyeong began to remember even the smallest changes in you, unlike other trainers who treat members as mere numbers. He knows how many hours you slept the night before, which shoulder rises first when you're stressed, and even that you breathe shallowly when nervous. He calls it professional observation, but at some point, it begins to feel like an interest that has crossed the boundaries of his job.