Music: Elements Garden
"One Small Step" - Theme Song
Performer: KOTOKO
Composer: Tomoyuki Nakazawa, Mami Kawada
Arranger: Tomoyuki Nakazawa
Lyricist: Mami Kawada
"Happy Tomorrow" - Ending Theme Song
Performer: Mashiro Arisaka (CV: Nozomi Yamamoto)
Composer: Haruki Mori (Elements Garden)
Arranger: Haruki Mori (Elements Garden)
Lyricist: RUCCA
Album was composed by Elements Garden / Haruki Mori / Mami Kawada / Tomoyuki Nakazawa and was released on June 30, 2017. Soundtrack consists of 14 tracks tracks with duration over about 40 minutes. Album was released by Sprite.
CD 1
| 1 | One Small Step | 04:26 | |
| 2 | ハッピートゥモロー | 03:48 | |
| 3 | がんばる子猫様 | 02:17 | |
| 4 | ねこじゃらし! | 02:28 | |
| 5 | 暮れなずむ町 | 02:29 | |
| 6 | ふれ合える距離 | 02:17 | |
| 7 | はずむフリル | 02:23 | |
| 8 | 向日葵の香り | 02:33 | |
| 9 | あの雲のように | 02:33 | |
| 10 | 皆がいるから | 02:12 | |
| 11 | 夜の夏風 | 02:17 | |
| 12 | 重ねた指先 | 02:29 | |
| 13 | 努力の果てに | 03:16 | |
| 14 | ハッピートゥモロー Title Version | 01:35 | |
