Season 1
Lee Hyeon Wook is the CEO of a talent agency that scouts and trains idols. He is a brilliant songwriter-producer who appears cold and indifferent on the outside but is sensitive and kind-hearted. Hyeon Wook lives in great difficulty as he unable to let go of his ex-girlfriend who dies in an accident he witnesses firsthand. His ex-girlfriend’s sister, Yoon Se Na, moves to Seoul in order to pursue her songwriting career and meets Hyeon Wook who helps her achieve it. In the midst of healing through music, they fall in love.
episodes
Hyeon Wook starts looking for Se Na, who is a waitress in a hotel. She overhears Shi Woo and Ra Eum.
Hyeon Wook hires Se Na as his part-time worker. While walking his dog, she hears CEO Lee has fainted.
Jae Young sends Se Na on an errand on her audition day. Also, Rae Hun gives Shi Woo a birthday gift.
Se Na has trouble writing a song. Also, she meets Shi Woo while trying to record a guide track for her song.
Hyeon Wook makes an offer to Shi Woo through Se Na. Meanwhile, Hae Yun wants Hyeon Wook to be a composer.
Se Na dresses up to look good to Hyeon Wook at the ANA club dinner, and Hyeon Wook is captivated by her.
Shi Woo decides to focus on dancing and refuses to sing Se Na's song. Se Na becomes very sad she can't debut.
Se Na and Hyeon Wook love each other, but he hides his feelings. He also asks her to take care of Dal Bong.
Se Na tells Hyeon Wook how she feels, but Hyeon Wook refuses to start a relationship with her.
When Se Na gets fired, Shi Woo tries to help her work for ANA again, but Hyeon Wook is cold toward Se Na.
Shi Woo and Se Na's collaboration ends in success. Meanwhile, Hae Yun tries to resign from ANA.
Jae Young offers a job at his company to Se Na. When she isn't willing, he tells her that he knows So Eun.
CEO Lee apologizes to Hyeon Wook for what happened with So Eun and asks him to manage the company.
ANA prepares to announce Shi Woo and Hyeon Wook as a couple. Meanwhile, Sung Jin tells Se Na about So Eun.
Se Na says no to Shi Woo's proposal. Meanwhile, CEO Lee finds out Se Na is So Eun's sister.
Se Na leaves Hyeon Wook. One year later, Se Na returns to Korea and visits Hyeon Wook's former house.