Koreans almost never, ever, address each other by their first-names. Throughout the drama, Dong Hoon calls Ji An either Lee Ji An, or Lee Ji An-sshi. But in the drama’s final line, after they part at the cafe, he calls her simply: Ji An.
“Ji An, have you found your comfort?”
@brose_stv explains the significance of Dong Hoon’s intimate address.
My Ahjussi / My Mister Fan Site 