Everyone watches a performance where a band is busking. The busker points at Do Ha-na and she gets to sing in front of a crowd. No one expects Do Ha-na would sing, but she starts to sing. As Do Ha-na sings, each friend looks back on their unordinary, one and only days of their lives as a teenager.
Casts:
Shin Ye-eun, Lee Na-eun, Kim Dong-hee, Choi Bo-min, Shin Seung-ho, Kim Soo-hyun, Ryu Ui-hyun, Kang Min-ah, Ahn Jung-hun, Jo Young-in, Myung Hyung-seo