Enclosed with the Japanese game Mamonoro KAI! ~Mamoru-kun wa Norowarete Shimatta!~ Special Edition: Underworld Reunion Box, for NSW & PS5.
Album was composed by and was released on September 25, 2025. Soundtrack consists of 17 tracks tracks with duration over . Album was released by Clarice Disc.
CD 1
| 1 | MEI-KAI Fever 「まもるクンは呪われてしまった！ スペシャルサウンドトラック」 | | |
| 2 | YO-KAI Disco (SUPER ARRANGE VERSION) | | |
| 3 | Bless you! Boy (SUPER ARRANGE VERSION) | | |
| 4 | Will Force (SUPER ARRANGE VERSION) | | |
| 5 | Fine Day (8BIT ARRANGE VERSION) | | |
| 6 | Bless you! Girl (8BIT ARRANGE VERSION) | | |
| 7 | Great Tribulation (8BIT ARRANGE VERSION) | | |
| 8 | Superhero (8BIT ARRANGE VERSION) 「まもるクンは呪われてしまった！ 冥界活劇アレンジ版」 | | |
| 9 | Blossom Shower (MEIKAI ARRANGE VERSION) | | |
| 10 | Lost Wind (MEIKAI ARRANGE VERSION) | | |
| 11 | YO-KAI Disco (MEIKAI ARRANGE VERSION) | | |
| 12 | Great Tribulation (MEIKAI ARRANGE VERSION) | | |
| 13 | Tropical Pirates (MEIKAI ARRANGE VERSION) | | |
| 14 | Karakuri Spirits (MEIKAI ARRANGE VERSION) | | |
| 15 | Ultimate Terror | | |
| 16 | YO-KAI Disco (VOCALOID Edition) | | |
| 17 | MEI-KAI Fever -VocalMix- | | |
