A Valentine's Day dance swings SNSD into full crush alert.

Yoona will do anything possible to win Junsu's heart—even play soccer in the mud—and Sooyoung worries that Changmin is spending too much time with Tiffany.

Hyoyeon asks pretty boy Yoochun to the dance, and Yuri is sure she’ll go with Yunho, until she realizes she promised to volunteer that same night. Meanwhile, Sunny wonders if it’s normal not to have a crush. Can SNSD find their way through the intricacies of love?