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. AKI), Ayana, Asuka Katagiri, Blue Velvet, C.G mix, Fuuran, Inosuke Tsutsumi, Eiko Shimamiya (A.K.A. PEKO or EIKO), Kaori Utatsuki, KOTOKO, Lia, Mami Kawada, MAKO, MARY, MELL, Mihi (sometimes incorrectly referred to as MIKI), MOMO, NANA, R.I.E,　SHIHO, TAKAMI, YUCCO, Yumi Matsuzawa. They have sung the theme songs for many Japanese eroge video games. Among Japanese animation (anime) fans, I've Sound is well known for singing the theme songs to popular anime: Such as Onegai Teacher (Please Teacher) and Onegai Twins (Please Twins) - all of which were performed by KOTOKO. They also performed (Tori no Uta) and ending (Farewell Song) to Key's popular eroge game and anime; Air. Both of these were performed by Lia. Originally, fans believed that I've stood for: "I Love, I Live, I Leave." But it turns out that I've comes from 愛撫 (aibu), the Japanese word for "caress", which traces back to their Eroge roots.