"Yojinbo is a band which performed the theme song from Hotaru Soul.
Formed by:
~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 Minakuchii (水口 誠) (from HuneX): harp"

[Description from Vgmdb]