Those that use "voice medicine," the ability to heal injuries and cure illnesses with song, are called "healers." There are three apprentice healers working at the Karasuma Voice Treatment Center. Kana Fujii, an energetic girl who sets the tone, the strong-willed lady Reimi Itsushiro, and Hibiki Morishima who is caring but firm. These three first year high school girls are training after school to become full-fledged Healers. With the addition of Sonia Yanagi, a returnee who is a certified C-level healer, the girls are singing songs of healing as they work towards their dreams.