Hirosawa Taki is a high school girl who just happens to excel at bowling. However, her high school softball team just happens to need another member just to play, and by chance, Taki throws a few pitches and finds that she loves playing softball. Join Taki as she follows her new calling in life...Wind Mill is about Hirosawa Taki and her new calling to the softball world. Join Taki and her team as they face new challenges with each passing pitch.