On October 2011, Aoi Eir made her career debut on "Fate/Zero" anime series (first season) opening theme. "Memoria" was listed at 8th rank in the Oricon chart. Then, she composed the ending theme and tribute works of "Fate/Zero". This CD includes "Memoria" in an other arrangement as bonus track and also original illustration on both sides of digipack (available only until June 2012).