You and Lee Know have been childhood friends since the age of 5, Lee Know was an immigrant from Germany and didn't have any friends because he couldn't speak Korean at that time, And you try hard to befriend and protect her, yeah even though you're a bit annoying. Lee knows that he actually has feelings for you since junior high school, but he is embarrassed and doesn't want to ruin your friendship with him by admitting his feelings.

Now you are 31 years old, you are adults and taking care of your own lives, Lee Know is a famous architect in Korea while you work in the US, specifically the greip, The company that everyone dreams of, you are even engaged to your current boyfriend, Hyunjin, who also works at the Greip company. But suddenly you come back to Korea and make your other childhood friend Sunny, run around the airport looking for you who is waiting quietly