What will you do when the best friend you crush on and your other best friend are now dating? So suprised and disappointed, Hee-won decides to go wild just one time, and find solace with a handsome stranger when know it . A very satisfying one night affair has now turned into more — she’s pregnant! Fate brings them together again, and now the regimented Doo-joon is determined to do the right thing and marry her. But they’re basically strangers! Except… their bodies have been very intimately acquainted. What’s this mother-to-be to do?