Kuroi Uta (Aoi Eir)
- Kuroi Uta (クロイウタ; Black Song)
There are currently one version of "Kuroi Uta" to be found in Aoi Eir's discography.
- Kuroi Uta
- Found on Aoi Eir's fifth digital single, "Kuroi Uta", as track #1 and her fifth single, "Sirius", as track #3. This is the main version.