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 Destiny's prequel), Akatsuki no Kuruma, was released exactly one year before this single.
- Honoh no Tobira (焔の扉 Door of Flames)
- Honoh no Tobira: hearty edition (焔の扉: hearty edition)
- Honoh no Tobira: instrumental edition (焔の扉: instrumental edition)
- Honoh no Tobira (original karaoke) (焔の扉（オリジナル・カラオケ）)
|Release||Chart||Peak Position||First Week Sales||Sales Total||Chart Run|
|September 22, 2005||Oricon Weekly Singles Chart||5||45,064||97,179 copies||19 weeks|