Han Tae Yi lost his will to live after the death of his older brother, who was a genius jazz pianist. To Tae Yi, transfer student Yoon Se Heon is truly an uninvited guest. Se Heon has been playing jazz that reminds Tae Yi of his brother since the first day he transferred to school and gets on Tae Yi’s nerves. Se Heon also suspects that Tae Yi has a suspicious relationship with his friend Seo Do Yoon. Se Heon, who longs to play jazz freely and escape the eyes of his strict classical music profess...
After the sudden death of his older brother, who loved jazz, Han Tae-yi loses his passion for music and wanders for a long time. Yoon Se-hun, a transfer student, appears and gets on Tae-yi's nerves by playing jazz songs his brother liked in the school practice room. Although Se-hun is a classical music major, he secretly admires jazz. Se-hun and Tae-yi often argue over using the practice room, where they learn more about each other, and the relationship gets more complicated......