There will be a new student in SM university. Yoona and Yuri made a deal, if Yuri falls in love with him she has to ydo everything Yoona wants(3 wishes). And if Yuri wins, Yoona have to do everything Yuri wants(3 wishes). When Kai comes, Yuri gasped as she saw that he is handsome. Everyday they always fight. Suddenly when Kai heard a news about Donghae confess his feelings to Yuri, he felt jealous. When it's summer holiday SM university had a vacation to Jeju, Kai saved Yuri from EXO's harassment. And it's the first time she felt her heart beating. Did they actually love each other?