Synopsis
Three close friends—Miku Hatsune, Luka Megurine, and Zimi Samune—share an unbreakable bond. One sunset evening, they solidify their promise to remain together forever by exchanging a star-shaped charm. But a devastating incident later tears them apart, destroying their unity. As the world around her fades into grayscale, Zimi watches helplessly, unable to halt the passage of time while her friends grow ever distant from one another.
