Amnesia
This story takes place in a fictional town, in a fictional country, in a fictional world. One morning, a young lady awakens to find that she has lost all her memories prior to that morning. Her life, her relationships, her very name—all gone. All that's left is a cell phone with numbers and names she doesn't recognize and Orion, a young boy that only she appears to be able to see. With Orion's guidance, she struggles to make sense of herself, a boyfriend she doesn't know and the thousand and one little things that make up a daily life. But with no memories left, the only alternative is to forge new ones, even if that means leaving old loves behind.
Starring Kaori Nazuka, Kisho Taniyama, Kouki Miyata, Akira Ishida, Satoshi Hino, Tetsuya Kakihara, Kana Akutsu, Satomi Moriya, Hidenori Takahashi, Seiko Yoshida
It's a animation and drama show, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of show.
Watch it here
Not found streaming from United States.