based on experience watching k-dramas it seems likely that seo ji-u's driver is actually her father. i mean he’s old enough to be her father, was always with her and now he's back.
so lin and ji experienced parallel timeline but cant believe her father also experiencing the same but in future for him. weird innit? (ep11 continuning....)
Ok, I finished it. I had to skip most of the part, though. Well, can just someone please explain the ending to me? Does he also remember everything like the female lead, or did he just time travel from the past, or, I don't know, did the character just come out to the reality through a portal somehow? Got a bit confused right there.