Mitsuyo Kakuta

Teruko is a 28-year-old office worker. 5 months ago, she fell in love with Mamoru at first sight. Since that time, she has not cared about her work or her friends. She then loses her job and her friends look at her coldly. Yet, Teruko is happy as long as she is with Mamoru. Meanwhile, Mamoru thinks Teruko is an easy woman for him to not love. Teruko’s unrequited love grows deeper.

When Yasuko (Eriko Hatsune) was a child, her mother left their home. She grew up not knowing what an ordinary family is. Satoshi's (Kengo Kora) mother was the girlfriend of Yasuko's late father. One day, Satoshi appears in front of Yasuko. Since that moment, Yasuko's monotonous life begins to change.

Daily, Rika Umezawa battles a nagging sense of emptiness and dissatisfaction. She works a tiring job, comes home to an unappreciative husband and has little opportunity to enjoy life. But things change when office gossip about affairs and embezzlement inspire Rika to do the unthinkable. Soon, Rika finds herself filling the void with a university student named Kota and the millions entrusted to her by clients. Is her newfound lifestyle the key to happiness? And if so, how long can it last?

After the collapse of their relationship, Kiwako abducts the 6-month old child of a man she was having an affair with. Raising the child as her own, it is four years before the authorities catch up with her and the young child.

Aikagi means "spare key" in Japanese, and this film presents a story of love and remembrance. Even if the owner of the key has left, the memories remain. Yukari (Hirosue Ryoko) and Hiroaki (Tamayama Tetsuji) have been together for eight years. Though they are both constantly busy with work and do not see each other often, Yukari believes that they will always be together. Just before Christmas, the couple finally has a chance to meet up, but Hiroaki tells her that he has found someone else and breaks up with her. The next day, a heartbroken Yukari cuts short her hair. When she sees Hiroaki's spare key, all the past memories come rushing back. Yukari decides to give him one last present.

On the surface, the Kyobashis appear to be a happy family. Despite a family agreement that they are all open with each other, the entire household knows the opposite is true.