 Its catalog number is VICL-35646.Coincidentally, the insert song of Mobile Suit Gundam SEED Destiny (Gundam SEED's sequel), Honoh no Tobira, was released exactly one year after this single.Originally, this song was released on "Suit CD vol.4 Miguel Ayman x Nicol Amarfi", an EP from Gundam SEED, under the name "FictionJunction featuring Yuuka".