Yojinbo is a band which performed the theme song from Hotaru Soul.

Don McCow as Don (ドン): guitar, vocals
Tomokazu Ushiyama as USSY (ウッシー): bass
Kousei Muraki as Kousei (コウセイ): keyboard
Hiroshi Horiguchi as ROZE (ローズ): drums & chorus
Makoto Minakuchi (水口 誠) (from HuneX): harp