Synopsis
Teruhiko(29) is a medical box salesman at Akafuji Medical Co. At a skating rink where he visits for business, he falls to the ice and is knocked unconscious. When he is pulled back to consciousness, he is in the hospital and realizes that he lost his bag. He goes back to the skating rink and find it. However, there is an engagement ring in the bag, which he never remembers buying it. It is a month away from his 30th birthday when he lost his memory as well as a fiancé to be.
The following day, Teruhiko gets to work where he finds a candidate for his fiancé, Chie(33). Chie is a research associate at the company who is beautiful and intelligent. As he goes out to visit his clients, he finds another candidate at a club, Megumi(21) who is young and sweet. Finally, in the park on his way back to the company, he meets the third candidate, a personal client Wakako(28) who is eccentric and shy. He doesn't remember all three, but he senses that he seems to be dating them by the way they treat him. Whom he decided to marry?
At the skating rink, Teruhiko has met a girl Emi(19) who gives him advice for the situation that he is dropped into. Following her advice, he goes on date with each of the three to bring himself a reminder of his memory as well as to find out whom he decided to propose marriage to. However, the more dates he goes on with them, the more he is attracted to all three equally. He finds they each have their distinctive charms. Time goes by while he is being indecisive, he realizes he has also got a special feeling for Emi.
With such circumstance, Teruhiko who can't decide who to marry nor regain his memory comes up with an idea to get away from reality. He stops seeing three and goes to the skating rink to see Emi, instead. A several days later, when he goes back home, all three are getting together and accuse him of cheating on them. While running away from the disaster, he falls down from a balcony. He finally recovers his memory.
Nine years ago at the skating rink, Emi(19) talks to a young Teruhiko(20) with a smile on her face. A year later from then, they goes on date at restaurant, theater and shopping. Another year later from that time, they move into an apartment and discuss where to place furniture. A couple of years later from then, Emi tells him to end their relationship when Teruhiko comes home from work with the engagement ring in his hand.
At present, in the hospital, Teruhiko proposes to Emi(29) on the bed and tries to put the engagement ring on her wedding finger when he is back in conscious. But, there is already a ring on her wedding finger. Emi tells him that she is getting married. In the end, Teruhiko says good-bye to Emi on the skating rink where he lets go of the past and moves on. The End.