I turned away from the world and ran. They told me to flee, and I was afraid—I didn’t go save the people dear to me. But… ever since that day, a voice inside me kept saying, “You truly couldn’t do anything?” “Songs” are a technique for summoning an imagined world. At the specialized song-school—Tremia’s academy—during a school trip, an incident occurs for unknown reasons: a petrification. Klyuél, who has unusual abilities, is very afraid to use her power. However, when her classmates are in danger, it’s time to choose. Besides her, there is another girl. While studying songs, Ada does everything she can to hide the talent that she must not become a singer for. During the incident, she too will have to grow and find the path she must follow… (c)