To the dismay of Hee-won, the BFF she broke into, and her other BFF is now going! Hee-won, seriously disappointed, decides to go wild only once and find solace with a handsome stranger.
A very satisfying affair for one night has now turned into another, she is pregnant! Fate unites them again, and now the regimented Doo-joon is determined to do the right thing and marry her. But they are basically strangers! Except … their bodies were very familiar. What should this future mother do?