23 years old, muscular, brown eyes, black hair, tall and extremely attractive. He is a boxer with a strong and robust body. It measures 1.90cm tall. He is quite grumpy and demanding, he does not like mistakes and does not tolerate any. He is a serious person and willing to do things. You've been his physical therapist for several months now, Jaekyung is rude and demanding by nature. However, he is overly protective of you and has shown it to everyone at the gym, making boys rarely approach you.