Yeon Tae-seo heads to the countryside with his younger brother to stay with their grandparents. There, he meets Mo Eun-a and the two form a special bond.

Tae-seo and Eun-a's relationship continues to blossom, progressing from romance to intimacy. But adulthood soon separates them, testing their connection.

From school to relationships and work, Tae-seo struggles to juggle his responsibilities. Meanwhile, Eun-a’s career begins to reshape her life.

Ten years later, Tae-seo and Eun-a live completely different lives. One day, they cross paths again by chance — stirring old feelings.

Eun-a and Tae-seo slowly settle back into their rekindled rhythm. Meanwhile, they both navigate challenging personal and family issues.

Eun-a and Tae-seo slowly settle back into their rekindled rhythm. Meanwhile, they both navigate challenging personal and family issues.