The drama depicts Kim Min Jae, a transfer student majoring in Practical Music and working part-time at the library, and Lee Kyu Ho, a Taekwondo major who helped him. Since their first meeting, the two have become entangled and closer, leading them to develop a romantic relationship.

• Son Byeong Hoon
• Choi Dong Ho
• Kim Yong Sol
• Jo Yoo Seok