|Released|| Concept: September 13, 2013|
|Genre||Vertical Danmaku Shooting Game|
|Gameplay||Single-Player Story Mode|
|Followed by||Immortal Youkai Army (Bonus Track)|
Nansei Ayakiban ~ Autumnal Mythology (南西 妖秋晩 〜 Autumnal Mythology lit. Mystical Autumn Evening from the Southwest) is the 7th official project in Nansei.
It was released as a direct sequel to NS03: Apocalypse. The first track in the album was released on September 13th, 2013.
- This is the direct sequel of Apocalypse.