Ichijo Ryoei is the son of the Ichijo family, who founded a large conglomerate. His life is perfect, but one day, he has an accident and falls into a coma. Meanwhile, Morikawa Natsumi gets into a different accident on the same day and at the same time as Ichijo Ryoei. Morikawa Natsumi also falls into a coma due to her accident, but she miraculously wakes up from her coma.
A couple of weeks later, she is discharged from the hospital. Finally, she goes back to her home. What awaits her is Ichijo Ryoei, who is a ghost. He tells her that she owes him her life even though she doesn’t remember why. He tells her that she is the only one he can rely on, and he asks her to do something for him.
