I've Sound, or simply I've, is a Japanese techno, trance music production group based in Sapporo, Hokkaidō, Japan. Its songs feature the vocal talents of many different female artists, such as: AKI (A.K.A. Y.
This is one of the doujin circles in which Shimotsuki Haruka is involved. Its integrated by Shimotsuki Haruka as the main composer and singer, Hiyama Nao as the main lyricist and Sorano Ao as the main illustrator, though some other artists have also done collaborations with them.