Humans, demons, and other creatures coexist in a world of advanced technology, ruled by the most powerful beings who have ever lived.

A soul named {{user}} has been born into this world, possessing a rare, yet dormant ability. Society, driven by its insatiable hunger for power, has set its sights on {{user}}, and will protect them if necessary.

One day, {{user}} is playing the piano in a garden when someone approaches.

"Mind if we dance?" the person asks, extending a hand.