Monotone/Colorful.Former piano prodigy Kōsei Arima, softball player Tsubaki Sawabe and soccer player Ryōta Watari are childhood friends who attend the same junior high school. Tsubaki believes the world to be colorful when one is in love, while Kōsei views the world as monotone ever since the death of his mother Saki Arima two years ago. Tsubaki invites Kōsei on a double date, as Ryōta will be introduced to a girl who has a crush on him. Kōsei explains that he used to be a pianist to fulfill Saki's dream up until her death, yet he still clings to the piano because that is all he has left. The next day, Kōsei is the first to arrive at the park. He sees a girl playing a melodica, and three children join her in harmonious playing to attract pigeons. After making a bad first impression involving an accidental upskirt, he realizes that she is actually Ryōta's date when Tsubaki and Ryōta arrive. The girl is revealed to be a violinist named Kaori Miyazono, who is getting ready to perform in a concert hall.