"uniStage" is an KARENT version of uniMemo-P's album of the same name. This version was released in December, 2011 with 9 tracks (including RinLenRaRin for the new tracklist) sung by KAITO, MEIKO, Hatsune Miku, Kagamine Rin and Len and Megurine Luka. The violin was provided by Nishizaki and Eri. This album along with Tanken to Boukensha no Fuku were released by KARENT for "Kagamine Rin/Len Festiva'11" event.