"The thing about love is I never saw it comin'

You kinda crept up and took me by surprise

And now there's a voice inside my heart that's got me wonderin'

Is this true, I wanna hear it one more time."

Park Jia is a 19 year-old no-boyfriend-since-birth kind of lass. She believes that love is not to be rushed because choosing the person you'll marry and live with for the rest of your life is one of the important decisions you'll ever make.

Oh Sehun, on the other hand, is a certified playboy. He only dates a girl for a week and leaves her hanging after that. His friends made a bet that there's only one girl who wouldn't fall for his charms, that girl is Park Jia. Sehun took the challenge, believing that his looks and his actions are enough to make every girl fall in love with him.