Keisuke Nijima lost his beloved wife Takae 10 years ago. Since then, he doesn’t feel alive and is seen as a depressed man. The only family Keisuke has left is his only daughter, Mai. Keisuke wants Mai to be happy, but he hasn’t done anything for his daughter other than cover her living expenses. The time between father and daughter stopped 10 years ago. They live in the same house, but lead very different lives and don’t communicate well. One day, a girl from elementary school appears in front of Niijima’s house and claims to be Takai’s reincarnation.