Yoomi is a cute girl that live with her parents in Busan.She's always controlled by her parents such as she can't go to crowded places alone and cannot hangout with her friends. Until one day,her dad told her that she will be studying at Bangtan High School next year. Bangtan High School had always been her dream high school since she was in secondary school but the high school was far from her home. Yoomi was afraid that she will not fit in and she will surely miss her parents. How will Yoomi's life be when she lives alone?