Kim Hyejeong is a girl with a mental disability. She cannot control her emotions, thus resulting in very violent acts. Despite her problem, her parents insist the people around her to act normal, as they want everything for their daughter to be as normal as possible.  Byun Baekhyun is a new transfer student of the class 4-B. He's a smart and jolly little man, with a bright personality. Added with his good looks, the girls come rolling into his arms. But beneath that seemingly inn