どんぐりころころ (Donguri Korokoro)

Background
"Donguri Korokoro" is a Japanese cover song featuring anon and kanon. It is the third demo created to promote the VOCALOID3 voicebank's release. It is a popular Japanese children's song, and was published in a multi-demonstration video alongside かたつむり (Katatsumuri) and 浜辺の歌 (Hamabe no Uta).