Aoi Eir (藍井エイル) recently revealed the jacket covers, bonus details, and a preview music video for her new single “Cobalt Sky” (コバルト・スカイ). Its her first single since “INNOCENCE” (2012.11.21) that was featured as the OP theme #2 for popular anime Sword Art Online...

Aoi Eir (藍井エイル) is getting ready to release her first single of 2013 “Cobalt Sky” (コバルト・スカイ). Its her first single since “INNOCENCE” (2012.11.21) that was featured as the second OP theme for popular anime Sword Art Online. Single “Cobalt Sky” comes on...