蜉蝣曲 (Kagerou Kyoku)

Kagerou Kyoku is a song sung by Miku Hatsune, Una Otomachi, Lapis Aoki, and Komachi Mirai. It is the one-hundred-and-twenty-second track, the one-hundred-and-twenty-third track, the one-hundred-and-twenty-fourth track, and the one-hundred-and-twenty-fifth track in Other Vocaloid Songs 153.