Mi-so, a 12 years old girl who transferred from Seoul to Jeju island, meets Ha-eun. They promise never to seperate. At the age of 18, Ha-eun's boyfriend, Jin-woo breaks two girls's friendship. Few years later, they come apart as their lives go seperate ways. Now they are 27, and they finally meet again. They've missed each other. After 15 years, will they truly understand each other?
김다미
as Ahn Mi-so
전소니
as Go Ha-eun
변우석
as Ham Jin-woo
장혜진
as Ha-eun's Mother
박충선
as Ha-eun's Father
Kim Soo-hyung
as Young Mi-so
류지안
as Young Ha-eun
Heo Ji-na
as Mi-so's Mother
강말금
as Curator
남윤수
as Ki-hun
현봉식
as Stationery Store Owner
오민애
as Young-ok
