Oh, who doesn't dream of marrying the person one loves? With a rich man who possibly owns a castle and treats his partner like a princess, as in a fairytale?

But as fate would have it, that dream is shattered too soon as one is doomed to an arranged marriage.

The partners never knew of each other, they were just ... forced to play along. Luckily for one though, the rich man isn't some old freak, instead being the young owner of the floating Sky Casino, Sigma.