Yu Xing. Because of an accident, he time-traveled into the body of another dead girl with the same name, Yu Xing. He dropped from college to high school and re-study for the college entrance examination. During the days of studying hard, he met another friend Cheng Rou. It turned out that he also time-traveled because of an accident. The two of them tested each other. They both tried hard to maintain the persona of the original body owner...
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