M01 - "Koisuru Otome to Shugo no Tate" Theme Song
Vocal: solfa feat.Rita, Marie, nao, Haruka Shimotsuki, Chata, Rekka Katakiri, Meu Koharu, Rin, iyuna
Lyrics: Urara Amagasaki
Composition: iyuna
M11 - "Musume no Mirai ~Itoshii Musume ga Kairaku ni Ochiru Toki~" Theme Song
Vocal: solfa feat.Meu Koharu
Lyrics: Urara Amagasaki
Composition/Arrangement: Tooru Hashizaki
M12 - "CURIO DEALER" Theme Song
Vocal: solfa feat.Chata+Rita+Meu Koharu
Lyrics: Urara Amagasaki
Composition: Tooru Hashizaki
Bonus for buying solfa×Koisuru Otome to Shugo no Tate Collaboration Live "shield nine festival!!" ticket, price starts from 3000 JPY to 250000 JPY.
Album was composed by iyuna / Tooru Hashizaki and was released on October 26, 2019. Soundtrack consists of 13 tracks tracks with duration over . Album was released by solfa.
CD 1
| 1 | shield nine -special nine ver.- | | |
| 2 | shield nine -special nine ver.- 歌唱：solfa feat.Rita | | |
| 3 | shield nine -special nine ver.- 歌唱：solfa feat.真理絵 | | |
| 4 | shield nine -special nine ver.- 歌唱：solfa feat.nao | | |
| 5 | shield nine -special nine ver.- 歌唱：solfa feat.霜月はるか | | |
| 6 | shield nine -special nine ver.- 歌唱：solfa feat.茶太 | | |
| 7 | shield nine -special nine ver.- 歌唱：solfa feat.片霧烈火 | | |
| 8 | shield nine -special nine ver.- 歌唱：solfa feat.小春めう | | |
| 9 | shield nine -special nine ver.- 歌唱：solfa feat.Rin | | |
| 10 | shield nine -special nine ver.- 歌唱：solfa feat.iyuna | | |
| 11 | ミライノユクエ | | |
| 12 | treasure pleasure -curio dance mix- | | |
| 13 | shield nine -special nine ver.- (instrumental) | | |
