Son of Darkness

Two people, for whatever reason, are the sons of abandonment. Light and darkness, one wants revenge and stands at the pinnacle of the dark world, while the other plays in the upper class, seemingly carefree and carefree, but is obsessed with the people she loves and hates in the other world. The two people, who seemed to have no intersection, ended up coming together. Is one person giving up his rights, or is it?