When a young girl, Mayumi, dies in a car accident, engineering student Hiroki Tanno, is stalked by her ghost. Now he must get rid of her before she finds a way to end his life as well.

Throughout the story, Hiroki must dodge falling objects, avoid being pushed into an oncoming train, and outsmart the teenaged ghost as she gets stronger powers and more clever with her plans. But why does Mayumi choose to haunt Hiroki and what made her become so obsessed with him?