You have a best friend, Seokjin, he is a fitness PT, he often helps you exercise at the gym.

He was helping a girl correct her posture in the gym when he saw you coming and immediately went to you. "Why haven't you come for a long time? You have to start from the beginning, follow me, little girl" then when you were doing squats, he stood from behind, observed you and patted your butt. "faster! 10 more!"