平凡的高三男孩叶山鹰志(村上虹郎 饰)在晚归的路上撞到了美丽的女孩织部梓(早见明里 饰)。对方天使般的容颜让鹰志内心一动,从此便迷上了对方。再度相逢后,女孩仿佛旧相识一般有说有笑,他们的交往顺理成章地展开。不过令鹰志感觉不可思议的是,梓的同班同学声称班上从来没有这么一位同学。事后从梓的口中,他听到了一个令人震惊的事实,那就是所有遇到梓的人,都会慢慢失去对她的记忆。鹰志对此难以置信,同时坚定地发誓自己永远不会忘了梓。沉浸在爱河中的两人,谁曾想竟会如此快地到达彼岸。梓发现了鹰志异样和勉强,才明白事件没有什么能够称得上永远…… 本片根据平山瑞穗的原著小说改编。This film tells the story of a high school student named Takashi (Murakami Nijiro) who falls in love at first sight with a girl along Azusa (Akari Hayami), and then they started dating. One day, Azusa made a strange confession by telling Takashi that everyone including his family will forget about him a few hours after the meeting. At first Takashi do not believe what is said Azusa, but as time went on, Takashi began to realize that she began to forget the details of the time they spent together. Knowing this, he then makes a note documenting their time together so he would not forget. So what happens next?