The Girl Who Leapt Through Time (2006)

Makoto Konno, a high school student in Tokyo, discovers she can time leap after a near-fatal accident. Initially using her newfound power frivolously, she soon realizes the consequences of her actions. But when tragedy strikes, Makoto learns the true gravity of her powers. With the help of a mysterious boy from the future, Chiaki, she tries to right her wrongs and find a way to save her friends.