The story begins with the first two protagonists, Delta and Casty. This pair must find and obtain a special song for Sarly, a friend of theirs. The name of this song is Ciel N Protecta, and this song has apparently been stolen. This was causing the machines in Felion to go crazy, and thus begins the duo's search. However, they end up getting caught by the Genomirai Church. The church's leader, Zir, plans to sing and use a Song Magic that is very dangerous.
The next two protagonists, Ion and Earthes, are actually trapped in a different, sealed world and plan to escape from it. They ultimately succeed and end up in the city of Tenryosara, where they meet Kanon and Tattoria.
From here, the two pairs of protagonists explore and learn more about this world. Their stories do intertwine, and they will eventually meet each other.
