 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".Due the song's popularity and the fact that September 2004 was Gundam SEED's one-year anniversary, it was later released as a single obtaining the twelfth place on the Oricon charts, which later rose to the tenth.