ICE from AKB48
ICE from AKB48 is a subgroup from Akihabara48. This subgroup was created for the purpose of voice-acting for an anime called ICE. ICE from AKB48 also sang the opening theme for ICE: アイサレルトイウコト for ICE (Aisareru to Iu Koto for ICE).
No more official statements have been made, but it is generally assumed that this unit will not continue to produce music beyond the anime.