In 2003, Makiya Minato attends high school in Okinawa as a senior. He meets junior student Tamashiro Miu from the same high school. They share the same love for music and are attracted to each other. On Minato’s graduation day, he confesses his feelings to her, and they begin to have a romantic relationship. Then, Minato’s mother dies from a disease. Minato is about to give up on his dream of making music, but Miu persuades him to go to a university in Tokyo.Two years later, Miu comes to Tokyo. They reunite and enjoy their time together while Miu pursues her dream of becoming a translator. One day, Minato suddenly breaks up with her, and he disappears.(Source: AsianWiki)~~ Adapted from the song "366 Nichi" (366日) by HY.