The Girl Who Leapt Through Time — Yasutaka Tsutsui

One of Tsutsui's best-known and most popular works in his native Japan, The Girl Who Leapt through Time is the story of fifteen-year-old schoolgirl Kazuko, who accidentally discovers that she can leap back and forth in time. In her quest to uncover the identity of the mysterious figure that she believes to be responsible for her paranormal abilities, she'll have to push the boundaries of space and time, and challenge the notions of dream and reality.