あの双子が円周率1000桁に挑戦 (Ano Futago ga Enshuuritsu ni Chousen)



The Twins Challenged Pi Of 1000th Digits is a song sung by Rin Kagamine and Len Kagamine. It is the two-hundred-and-sixty-fourth track in Other Vocaloid Songs 10: Luka And Rin and the seventy-first track in Other Vocaloid Songs 25: Mostly Len.