Generation of Chaos: Pandora's Reflection

The game takes place in the dark, barren world of Hades, revolving around a boy named Claude, and his sister named Yuri. In the game, Yuri is cursed with a butterfly tattoo, leading Claude to vow to travel the world in order to find a way to break the curse. Along their travels, they also become entangled in a larger struggle that could decide the fate of the entire world. (wiki)