Misaki, a pianist, holds piano lessons at home in addition to her concerts, supported by her understanding husband. One day, Misaki notices that her piano is out of tune and consults with a familiar tuner, but unfortunately he is too busy. She is introduced to a tuner named Kagiyama, who is said to be "very skilled," and asks for his help for the first time. However, she becomes angry at Kagiyama's rude remarks and tries to send him away, but...