just a gist of it but :
basically mijeol wakes up and calls out to cheong to bring her water . when he doesn't show up she goes out her room and sees her mother and enquired where cheong is. The mother replies that he went back to korea.
Mijeol : you mean he's at the airport?
mom : he's probably already back to sk.
and then the mom is like "are you back to your senses ? did you take some medicines to be out so long?"
and then the airplane flashback
basically cheong accompanied her to their home and left right away
You're my saviour tysmmm
Im sorry but I don't can't read Korean ☹, please translate it