- Come Back to the WorldPerformed by Tomoyo MitaniMusic and Lyrics by Chikayo Fukuda
- As You PleasePerformed by Tomoyo MitaniLyrics and Music by Chikayo Fukuda
- Gentle HandsPerformed by Tomoyo MitaniMusic and Lyrics by Chikayo Fukuda
- Fly Mecha Grunty!Performed by Yasutaka AnzaiLyrics and Music by Chikayo FukudaChorus: GoGoGirls
- Slow DobermanPerformed by Yasutaka AnzaiLyrics and Music by Chikayo FukudaChorus: Hiroshi Matsuyama (as Piroshi Matsuyama)
- Destination of TruthPerformed by Tomoyo MitaniLyrics and Music by Chikayo FukudaChorus: Tomoyo Mitani, Yasutaka Anzai
- We are Grunties!Performed by Yasutaka AnzaiLyrics and Music by Chikayo FukudaChorus: Hiroshi Matsuyama (as Piroshi Matsuyama) & precious .hackersRapper: Hiroshi Matsuyama (as Piroshi Matsuyama)
- Your Gentle SmilePerformed by Tomoyo MitaniLyrics and Music by Chikayo FukudaChorus: Tomoyo Mitani, Yasutaka Anzai
- JusticePerformed by Yasutaka AnzaiLyrics and Music by Chikayo FukudaChorus: Hiroshi Matsuyama (as Piroshi Matsuyama)Guitar: Hisako Nagashima
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