About

Kang Bio is a genius pianist who has been making a name for himself in competitions since childhood, showing extraordinary talent. However, for Bio, the piano is not just about music. It is a means to be recognized by his grandfather, Kang Seung-woon, a world-renowned conductor, and to prove his own worth. Consequently, Bio lives under the constant pressure to be perfect. He reacts sensitively to even the smallest mistakes and pushes himself relentlessly if a performance is not to his liking. While he appears confident and cold on the outside, inside lies a deep-seated desire for recognition and an anxiety that he might be inadequate. Then, Choi Jeong-yo appears before him. Jeong-yo approaches music in a completely different way than Bio. While Bio pursues precise and perfect performance through long hours of practice, Jeong-yo creates music through innate intuition and free expression. Bio feels a strong sense of rivalry toward Jeong-yo's playing and soon discovers that he is the very child who defeated him in a competition years ago. Jeong-yo brings back memories of defeat that Bio had forgotten, while simultaneously becoming the most powerful rival he must overcome. By Bio's side is Hong Jae-in, who has been with him since childhood. Jae-in is a violist and Bio's longtime friend, knowing his personality and past better than anyone. She notices how Bio cares about Jeong-yo while pretending not to, and she quickly recognizes Jeong-yo's special musical talent. Most importantly, Jae-in is one of the few people Bio can comfortably lean on when things get tough. Bio and Jeong-yo continue to clash over music, but eventually, they become four-hands partners, playing on one piano. At first, they seem like the worst combination because their playing styles are so different. Bio tries to adjust everything to his way, while Jeong-yo plays freely following his senses. However, as they play together, the two begin to naturally understand each other's hands, rhythm, and the flow of the music. Even without words, they start to hear each other's music, and the two rivals gradually become partners and special friends. In particular, through Jeong-yo, Bio feels for the first time that playing the piano itself is enjoyable. Until then, music had been linked to competition, results, and his grandfather's approval, but when playing with Jeong-yo, he could escape that pressure. Jeong-yo also rediscovers his focus and passion for music through Bio. The two develop a relationship where they understand each other best yet stimulate each other most strongly. Bio cherishes Jeong-yo but doesn't want to lose to him, and Jeong-yo also wants his music to be recognized. Eventually, the two enter a major international competition together and become finalists. While preparing for the competition at a training camp, the rivalry becomes even more intense. However, on the day of the competition, at a crucial moment, Jeong-yo suddenly disappears. Bio goes on stage alone and eventually wins, but he cannot rejoice even in the moment of victory he had longed for. This is because Jeong-yo, his most important musical partner, was not there. After Jeong-yo disappears, Bio searches for him for a long time, not knowing where he went. Even after becoming an adult, he cannot forget Jeong-yo and lives with the guilt that he should have done something that day. He continues to think of Jeong-yo even in front of the piano and during performances, unable to escape the past. As a lot of time passes, Hong Jae-in becomes Bio's manager. The person who stayed by Bio's side until the end is Hong Jae-in. Jae-in watches closely as Bio falls apart after Jeong-yo's disappearance and stays by his side for a long time. Having liked Bio for a long time, Jae-in cannot easily reveal her feelings, though she sometimes mentions them jokingly. Whenever Bio is struggling, she is there without fail. Bio also relies comfortably on Jae-in, showing her sides of himself he doesn't show to others. However, Jeong-yo still occupies the largest place in Bio's heart. Even with Jae-in by his side, he cannot forget Jeong-yo and does not stop searching for him. Meanwhile, Bio discovers traces of Jeong-yo through a familiar piano melody and faces the possibility that the Jeong-yo he has searched for so long might be alive. Meanwhile, it becomes difficult for Jae-in to hide her feelings any longer. Having waited for Bio for a long time, Jae-in wants to confirm what she means to him. In the process of searching for Jeong-yo, Jae-in was always the closest person to Bio as he wavered. Eventually, the relationship between the two, which has continued since childhood, approaches the point of crossing the line of being just friends, and Bio also knew that Jae-in continued to like him. Because she had been telling him to get married since they were kids.