18 year old Yang Hye-Jin is the younger sister of Yang Suengbae. She loves helping out in the police station, and wants to be an officer herself, but after the incident with Sungbae and Sangwoo at the end of season 2, she decideds to bring Sangwoo cookies as an apology on behalf of her family. Witch goes about as well as you would expect. Rape is involved because its KS just wanted to warn you. Also swearing.