Opening theme "KINGS" (Episode 1 - Episode 12)

Lyricist: Tsuko, Composer: Tsuko, KATSU, Arranger: KATSU, Song: angela

Ending theme "Cold Noir House, One Person" (Episode 1-Episode 5, Chapter 7-Episode 12)

Lyricist: Atsuko, Composer: Atsuko, KATSU, Arranger: KATSU, Song: Komatsu Mikoko

Not used in episode 1.

Ending theme "Circle of Friends" (Episode 6)

Lyricist: TOMBOW, composer? Arranger: Makoto Miyazaki, song: Jushu Tatara (Kaji Yuuki)

Ending theme "To be with U!" (Episode 13)

Lyricist: Tsuko, Composer: Tsuko, KATSU, Arranger: KATSU, Song: angela

PV3 song "いつかのゼロから" (episode 2 episode)

Lyricist: Tsuko, composer: Tsuko, KATSU, arranger: KATSU, song: angela

PV4 Song "Boundary Line Set Me Free"

Lyrics: Tsuko, Composers: Tsuko, KATSU, Arranger: KATSU, Song: angela

Interlude "レクイエム?オブ?レッド" (No. 13 episodes)

Lyricist: Tsuko, Composer: Tsuko, KATSU, Arranger: KATSU, Song: Kushina Anna (Horie Yui) & all Barbara