Fake dating her real crush. What could go wrong?

What straight-A student and all-around good mergirl Coral Ballenato wants is to forget her longtime crush on her best friend's older brother. Four years of pining from not-so-afar is more than enough. Moving on should be easy now that he's swum off to college.

Until Zak Marlin comes home for a charity event, newly-single and begging her to be his pretend girlfriend for the week.

She should say no...but surely she can handle playing the role of Zak's sweetheart. After all, she's been dreaming about it for years. She just has to make sure her heart is braced for the inevitable end.

But when every minute they spend together makes her fall deeper and deeper for the merguy she's always loved, how will Coral ever be able to move on when the week is over?