On a small island, Jin, a teenage girl going through puberty, begins her first love affair with her best friend Dujae.

Follows two teenagers, childhood best friends, who reunite for a summer on a small rural island in Korea.

During a summer vacation, Ok-ju and Dong-ju move into their grandpa's house. While Dong-ju adapts to his new home, Ok-ju feels awkward about this new environment. Once their soon-to-be-divorced aunt also moves in, and as Ok-ju spends time with her family, the house and her grandpa start to grow on her.