In order to defeat her brother, she disguised herself as a man and entered Qingxue. She had to leave Qingxue for tennis. She had to give up tennis for friendship. She went in and out for tennis and sacrificed for her lover. But in the end, what awaited her was a difficult multiple-choice question, reality or fantasy? Lover or relative? Leave or stay? She kept doing difficult multiple-choice questions. . . . . . If time travel is for meeting, then leaving is the final outcome?