When you finally realize that you love your childhood friend of almost 13 years, what do you do? Confess? Not when your best friend Krystal, a member of the super famous k-pop band, f(x), declares her love for him and will stop at nothing to get him. How would you compete against a k-pop idol when you're just the grandaughter of a cold hearted ahjumma, owning a quiet dingy cafe on a crowded street in Seoul? But t