Forget Me Not

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?