スピラ・スピカ (Spira Spica) is a solo project of lyricist and vocalist 幹葉 (Mikiha).
The project started as a pop/rock band named スノーマン (Snowman) in 2013. When drummer やまと (Yamato) left in 2017, the band reduced to a three-piece line-up and changed their name to Spira Spica afterwards. At the end of August 2022, guitarist 寺西裕二 (Yuji Teranishi) and bassist ますだ (Masuda) left the band, and singer 幹葉 continued Spira Spica as her solo project.