We are neither kids nor adults. When do we become adults then?
Min-jae and Seo-yeon are no different from ordinary 17-year-old high school students. Min-jae is silent and sensitive, yet a good student. Seo-yeon who plays the piano wished to enter an arts high school but failed. As they grow into adults, their surroundings and the reality they face get harsher. These two somehow similar but different friends get closer as they overcome their growing pains together.

Seo Jeong-yeon
Jeong-kyeong

Sieun
An Seo-yeon

Lee Hang-na
Lee Hae-young

Yoon Chan-young
Ko Min-jae

Baek Su-ho
Kang Ki-hyeon

Kim Jong-tae
Min-jae's Father

Park Se-hyun
Jung Yu-ri

Choi Dae-hoon
Choi Soo-hwan

Oh Dong-min
Homeroom Teacher
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