One day, on her way to school, middle school student Aya suddenly falls to the ground. The doctor diagnoses her with spinocerebellar degeneration, a rare and incurable neurological disease. Entering high school, Aya's condition continues to worsen as physical movements become more difficult. Forced to attend a special boarding school, she nonetheless finds hope and happiness through the support of her new friends and family. Working hard, she completes her high school