As the story progresses, Tae Yi struggles to deal with the loss of his brother and the resentment he feels towards Se Heon for playing his brother’s song. However, Tae Yi's curiosity gradually gets the better of him and he finds himself drawn to Se Heon's piano playing.
Se Heon, on the other hand, is a talented yet introverted transfer student who has always used music as an escape. His love for jazz is deeply rooted in the bond he had with his late father, who was an accomplished jazz musician. Se Heon's passion for music is driven by the desire to reconnect with his father's memory.
As Tae Yi begins to witness Se Heon's passion for jazz and the emotions he pours into his playing, his anger starts to morph into a confusing mixture of fascination and envy. The two boys, initially at odds with each other, slowly start developing an unlikely friendship as they explore their shared love for music.
Together, Tae Yi and Se Heon embark on a journey to form a jazz duo, motivated by their mutual ambition to honor their respective loved ones through music. They enroll in jazz competitions, face challenges, and gradually open up about their personal struggles along the way.
As Tae Yi and Se Heon's bond strengthens, they find solace in the music they create together. They learn that jazz is not merely a genre of music but a reflection of life itself - its unpredictability, complexities, and raw emotions. Both characters begin to heal, finding comfort and understanding in each other's company.
However, their path is not without obstacles. Tae Yi's anger and resentment resurface, testing their friendship and collaboration. Se Heon's insecurities and fear of failure hinder their progress. They must confront their inner demons and confront the ghosts of their pasts to find the strength to keep going.
Throughout the series, the audience witnesses the growth and transformation of both Tae Yi and Se Heon, as they prove that music has the power to heal, connect, and transcend boundaries. They not only create beautiful melodies but also create a profound impact on each other's lives, forever changing the course of their individual journeys.
Ultimately, their story becomes a testament to the power of music and the strength of human connection, reminding viewers that sometimes the most unexpected partnerships can lead to the most extraordinary artistic and personal growth.