The Co-Worker

Kim Ji Hyun is Kim Namjoon's sister. She is looking for a job after graduating from college. She goes for an interview at Samsung Electronics. She is accepted. Once she begins her job she meets someone she never thought she'd had to meet again. Park Jimin he is Ji Hyun's Co-Worker. She hated him in High School when he humiliated her in front of everybody. He continued to do so until graduation.