Angel's Last Mission: Love (2019)

S1E17 Yeon Seo & Seong Woo's Old Memories

Yeon Seo dreams about her childhood friend, Seong Woo, prompting her to visit the island where they first met. Upon arriving, she inquires with the villagers about the boy, only to learn that he passed away many years ago. During her time on the island, she unexpectedly encounters Dan, leading to a new connection amid her memories of Seong Woo.