From the days of housekeeping, Jung Hyoon had promised Yoon Su that he will marry her. For 3 years Yoon Su has been preparing meals for Jung Hyoon before he takes his test believing in the promise made to her. But Yoon Su's goal of life had suddenly changed and disappeared after rushing out of her SAT testing room. While daydreaming, she had nowhere to go. Coincidentally she met her old optimistic friend Tae-Kyung who is also taking the SAT test.