おめでとう (Omedetou)

Congrats is a song sung by Mizki Himemi, IA Akasaka, Anon Hakuri, Kanon Hakuri, and Flower. It is the two-hundred-and-sixty-first track, the two-hundred-and-sixty-second track, the two-hundred-and-sixty-third track, and the two-hundred-and-sixty-fourth track in Other Vocaloid Songs 66: Making A Comeback Volume 14.