Makoto is a typical teenage girl who spends most of her days slacking off with friends. One day while rushing to meet her aunt, she nearly gets hit by a train, but at the last second, finds herself jumping backwards through time to avoid the accident. She immediately makes use of her newfound ability to re-do every minor inconvenience - from poor exam results to awkward confessions of love. However, when faced with the consequences of tampering with time, Makoto must do everything she can to avoid a dire future that can't be reversed.