In 2003, Minato Makiya (Eiji Akaso) attends high school in Okinawa as a senior. He meets junior student Miu Tamashiro (Moka Kamishiraishi) from the same high school. They share the same love for music and are attracted to each other. On Minato Makiya’s graduation day, he confesses his feelings to her and they begin to have a romantic relationship. Then, Minato Makiya’s mother dies from a disease. Minato Makiya is about to give up on his dream of making music, but Miu Tamashiro persuades him to go to a university in Tokyo. Two years later, Miu Tamashiro comes to Tokyo. They reunite and enjoy their time together, while Miu Tamashiro pursues her dream of becoming a translator. One day, Minato Makiya suddenly breaks up with her and he disappears.
Unfortunately the movie 366 Days is not yet available on HBO Max.
| Directing | Takehiko Shinjo | Director |
| Production | Shigeaki Yoshida | Producer |
