The Little Girl Who Conquered Time (1983)

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Tomoyo Harada is an average student in high school. She has an old friend Toshinori Omi who goes to the same school, and Ryoichi Takayanagi who is also her classmate, but is not quite the old friend she thinks he is. One day after a routine cleaning of the school’s chem lab, she starts to experience a time warp in her life where she experiences the same event multiple times. Quite by accident, she is getting drawn into the plan that came from the future. She soon discovers why she is experiencing the time warp.