Miku Hatsune, Luka Megurine and Zimi Samune have been best friends since childhood. Under an orange sunset, the three girls share a star-shaped charm and promise to stay together always. A tragedy soon strikes and breaks their bond apart. For Zimi, the world fades into dull monochrome, and she can only watch as time goes by and her friends drift further from each other. The piece is a short music drama built around Vocaloid characters, with a quiet slice of life feel.