After her mother's passing, Rin vows to become a lady and journeys to England to reunite with her estranged family. Initially met with skepticism, particularly from her stepsister Sara, Rin gradually integrates into their household, forging strong familial bonds. With a keen passion for horses and racing, Rin excels in various competitions. The narrative unfolds in two segments, the first depicting Rin's childhood and the second capturing her experiences at around 13 years old.