The story of Ar Tonelico II Melody of Metafalica takes place in a world where humans and magical creatures, known as "Tono," coexist. The game follows the journey of Stilchine, a young girl who possesses the ability to hear the songs of the Tono. As she embarks on a quest to save her village from destruction, she discovers that her voice holds the key to unlocking the secrets of the Tono and the world's fate.
The gameplay in Ar Tonelico II Melody of Metafalica is an action RPG with real-time battles. Players control Stilchine as she explores a vast open world, completes quests, and engages in turn-based combat. The game features a unique "Song" system, where players can use Stilchine's voice to heal or deal damage to enemies. The game also has a deep character customization system, allowing players to craft and upgrade equipment for their characters.