Immortal Youkai Army
|Released||November 6, 2013|
|Followed by||Border of Heaven|
Nansei Eiyougun ~ Immortal Youkai Army (南西 永妖軍 〜 Immortal Youkai Army lit. Eternal Army of Calamity from the Southwest) is a bonus soundtrack (not to be confused with the actual organization) by Lenk64.
More about the dangerous organization which contributed into attempting to stop the humans in the Core City during the events of Unknown Traveling East and which former soldier Christian Finrando worked for is revealed. Vampire Kaoru Fumetsu is set as the main character.
- OST 1: Night Watch ~ Equipped Youkai
- OST 2: Fantastic Festival ~ Immortal Ballad
- OST 3: Unknown Eastern Road ~ East Road
- Stage 2 theme from Unknown Traveling East
- OST 4: Nansei Fantasy ~ Kuusou no Sekai
- OST 5: Nozomi's Space Dream ~ Satellite State
- OST 6: Emotional Change in the Form ~ Serial Killer
- OST 7: Youkai Military Training ~ Campsite
- OST 8: Return to Field ~ Army
- OST 9: AH-64 Air Force Wars ~ Air Raid!
- Reiji Gunso's theme