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Taemin, Krystal and Kai are best friends. They're SMTOWN trainees. Taemin likes Krystal ever since she came but he doesn't know that Kai and Krystal knew each other before. When Kai came to SMENT, he became close to Krystal too. Before Taemin debuts, he confesses to Krystal but she doesn't take it seriously. He becomes busy while Krystal and Kai became closer to each other until Kai falls for Krystal too. Now that both of her best friends like her, she doesn't know what to do. But she knows she has to choose between them two.