Kawabe released the single "Be Your Girl" on April 27, 2004. This became the ending theme song to the anime "Elfen Lied", and her other song, "Hoshi ni Negai o" was the end theme song to "Otogizoshi". She released "Shining" in 2004, and "Kizunairo" in 2005. The song "I Can't Wait", from the "Kizunairo" single was used as the theme song to the Japanese version of the show "Lizzie McGuire". She released her first album, "Brilliance" in March 2005, and the single "Candy Baby" in July. Kawabe's next major single was "Sakura Kiss" which was the theme song for the anime "Ouran High School Host Club". The single charted in Oricon, peaking at 71.