Waking up alive was the last thing Sugita Monami expected after getting into a bus accident that killed everyone else but her, including her single mother. Not that she remember any of it though. As far as she "knows", she just accidentally fell from the stairs and worried her fiancee: Ninomae Juichi.
How long can Juichi sustain this aberration when the Heavens themselves are hunting him down because of it? Why did he even save Monami in the first place? Interfering with human lives-- especially one that was fated to die --is the one thing Shinigamis are forbidden to do.