ephemera is ryuryu's first album. It contains 12 tracks, all sung by Hatsune Miku. It was first released by KarenT, and later redistributed by the circle s10rw. Tracks 1, 6 and 12 are new. A crossfade of the album can be heard on Nico Nico Douga. The KarenT album is purchasable on iTunes, AmazonMP3 and KKbox. The s10rw album is puchasable on Toranoana.