Season 1/Music

Season 1
Opening Themes: Ending Themes: Insert Song:
 * "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)
 * "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)
 * "僕の中の君へ" (Romanization: "Boku no Naka no Kimi e," English: "To the You Inside Me") by TRUE (Episode 23)

Season 2
Opening Themes:
 * "Storyteller" by (Episodes 25-36)

Ending Themes:
 * "STORYSEEKER" by STEREO DIVE FOUNDATION (Episodes 25-36)

The Slime Diaries
Opening Themes:
 * "Brand new diary" by Akane Kumada (Episode 1-12)

Ending Themes:
 * To Be Announce.