Desperate Mrs. Seon-ju

Now, when I think of the sea... the memories that come to mind are mine. (1x3)

:

Upon their return to Korea, Nam-jin embarks on a short trip to the sea with Sang-ah, where they create secret memories together. Meanwhile, Seon-ju discovers a photograph filled with memories of Nam-jin in her mother-in-law's one-room apartment, where she finds traces of their past.