 The second track originally appeared on "Last regrets / Kaze no Tadoritsuku Basho" (2006) by Key Sounds Label, the third track came from I've Sound's compilation album "Regret" (1999), and the fifth track appeared on "Recollections" (2001) by Key Sounds Label.The song "Last regrets" was originally written and composed by Jun Maeda of Key, and sung by Ayana.The B-side contains a two-part recording of a group talk of the live performers from the concert.