Riko Fukumoto

A special investigative unit tackles everything from mysterious disappearances and shadowy figures to eerie supernatural phenomena.

Nobumasa Tsuboi (Yo Oizumi) runs a small factory in a small town. He has a daughter Yoshimi Tsuboi (Riko Fukumoto) who suffers from a congenital heart disease. A doctor tells Nobumasa Tsuboi that his daughter will only live for about 10 more years. Nobumasa Tsuboi is devastated that his daughter won't live past the ago of 20. Nobumasa Tsuboi and his wife Yoko Tsuboi (Miho Kanno) cannot accept the diagnosis. Even though he has no medical knowledge or experience, Nobumasa Tsuboi begins to study about artificial hearts.

Toru Kamiya performs a false confession of love to stop his classmates' bullying. The story begins when Maori Hino, a girl in his class (whom Toru has made the false confession to) gives him three strange conditions for going out with him: Not to talk to her until after school, To keep communication brief, and Not to fall in love with each other. Gradually, the promise of Not to fall in love falls apart, and Toru finally cannot hold back his feelings and confesses his love to Maori. However, Maori confesses to him that she has anterograde amnesia, which causes her to lose her memory in a day. Her memories and experiences are reset every day, and she writes down the day's events in a diary and wakes up early in the morning to review them in order to keep her memory alive. Toru is devoted to bringing her as many happy days as possible.