Lee Hyunki (19 years old) a Violin/Cello major at Seoul University and his little sister Lee Mihwa (16 years old). At the age of 6 Mihwa, got into a car accident and suffered brain damage. In short, physically she is 16, but mentally she learns very slow and is at the age of 10. Shortly after her accident, their father abandons their family because he couldn't handle Mihwa being mentally challenged. 3 years later, their mother dies of cancer and from then on they