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Official Themes
- Hartmann's Youkai Girl (On the right) : Koishi's theme from Subterranean Animism
- Hartmann's Youkai Girl : Koishi's theme from Trojan Green Asteroid
- Last Remote : Extra Stage theme from Subterranean Animism
Arranges and Remixes
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Hartmann's Youkai Girl : Techno/Jazz remix by dBu from the album Demon Tale Sonata.
Hartmann's Youkai Girl : Techno remix.
Hartmann's Youkai Girl : Rock remix by Dark PHOENiX.
Hartmann's Youkai Girl : Rock remix by Nazz-Can
Hartmann's Youkai Girl : PC-98 arrangement
Hartmann's Youkai Girl : Vocal arrange by EastNewSound
Hartmann's Youkai Girl : Vocal arrange by ALiCE'S EMOTiON
Hartmann's Youkai Girl : Vocal arrange by Buta Otome