Hoshi wo Tsumu Donna

From Romance Symphony: The main character is a student at a ballet school. Her sister is a famous prima ballerina whose grace shows in every move and expression. How does it feel to be compared to a sister like this? In fact, the girl is very talented. She doesn't practice nearly as much as her classmates, yet her performance is always superb. She dances without any pretension because she has no knowledge of her gift...