Choi Won and Oh Ha-na was best friend since high school. For last 20 years, they do lots of thing together and help each other in every aspect of life but never realize that they have been in love all the time. When they reach 34, Ha-na bets with Choi Won that she gets married first before 35.Sometime peoples takes years to discover what love is, will choi won and Oh Ha-na find their true love...