Valentine(2008)

A car crash on a bridge causes Keng and Prae a big trouble in their lives. When they regain consciousness, they realize that their souls have switched bodies. Things get even worse when both realize the unique problems of having a body of the opposite sex. Trapped inside each other bodies, Keng and Prae must find the way to return to their own bodies, but it's not so easy when many problems keep popping up.