Ar Tonelico: Sekai no Owari de Utai Tsuzukeru Shoujo  

In the game "Aurica Nestmile," a young Reyvateil named Aurica feels that her song magic is not very useful to anyone. Meanwhile, Lyner Barsett's airship crashes into the ground while he's on top of Ar Tonelico tower. After meeting each other, they embark on a quest to find someone who can fix their ship. During this journey, they also help themselves and each other.