, translated as "Door of Flames", is the fourth single of J-pop duo FictionJunction Yuuka. It was released on September 22, 2005.
This single includes an insert song of the anime Mobile Suit Gundam SEED Destiny, composed by Yuki Kajiura. There are two other versions of the song on the single (hearty and instrumental), along with its karaoke version. Its catalog number is VICL-35883. Coincidentally, the insert song of Gundam SEED (Gundam SEED Destinys prequel), "Akatsuki no Kuruma", was released exactly one year before this single.
This single peaked at number 5 on the Oricon weekly chart, but is the first single in voice acting history to reach number 1 on the Oricon daily ranking.
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