Season 1/Music

Season 1
Opening Themes:
 * "Nameless story" by (Episodes 2-14, OADs 1-2)
 * "Meguru Mono" by Takuma Terashima (Episodes 15–24, Episode 24.5, Episode 24.9, OADs 3-5)

Ending Themes:
 * "Nameless story" by Takuma Terashima (Episode 1)
 * "Another colony" by (Episodes 2-13, OADs 1-2)
 * "Little Soldier" by (Episodes 14–24, Episode 24.5, Episode 24.9, OADs 3-5)

Insert Song:
 * "To You Within Me" (Japanese: "僕の中の君へ," Romanization: "Boku no Naka no Kimi e") by (Episode 23)

Season 2
Opening Themes:
 * "Storyteller" by (Episodes 25-34, Episode 36)
 * "Like Flames" by MindaRyn (Episodes 37-?)

Ending Themes:
 * "STORYSEEKER" by STEREO DIVE FOUNDATION (Episodes 25-33, Episodes 35-36)
 * "Reincarnate" by Takuma Terashima (Episodes 37-?)

Insert Song:
 * "Reimei" by (Japanese: "黎明," English: "Dawn") (Episode 34)