Jung Eunji is a cheerful 20 year-old girl with a heart full of passion for music. She loved and enjoyed music since childhood when her best friend introduced it to her, which is also when she started singing along with song writing. When Eunji enters in performing arts in a university most popular for music with a happy heart, she believes that it would the best few years of her life. However, her university music life doesn't go as she expected when she encounters an over-confident guy. With her mind set on her dream of becoming one of Korea's best singers, Eunji is determined to do anything to reach her goal.

Kim Sunggyu is considered a bad boy. He is always over-confident of himself especially when it comes to music; you can't really blame him though. Sunggyu is known to be a music prodigy, for his dad was one of Korea's most famous song writers, with his mom as one of Korea's best singers. Since childhood, Sunggyu was always around music which made him interested in it as well. When he finally reaches 20, he is able to attend the university his parents own. However, when he suddenly encounters a girl whose voice attracts him, he starts to change. Sunggyu is determined to become one of Korea's best male singers as is goal and dream.

Lee Sandeul is optimistic 20 year-old boy who has been best friends with Eunji since childhood. He was the one that introduced music to her so they sang together since they were little kids. However, what Eunji doesn't know is that she was his first love and he has had a crush on her since a long time ago. He attends the university with Eunji, which is the same university his parents use to attend. Sandeul also shares Sunggyu and Eunji's dreams and he is just as determined as they are to reach it.