Talk:あの双子が円周率1000桁に挑戦 (Ano Futago ga Enshuuritsu ni Chousen)/@comment-413614-20150307082830

Haha, I remember this trend. There was brief a time when people made their own "pi" songs, including putting vocal tracks of a Vocaloid reciting pi on top of an already existing song. But mostly it was just mashups with this song.