Most of the stories, there's always a villain. An evil, story wrecker. Cloud and Sky's relationship however doesn't follow this rule. Their story has no villain, nor something that can wreck them apart. They don't follow a certain rule, but bounds to always make the right thing. No one dares to stop them, but needs to halt themselves. No, not because someone's against. No, not because it's wrong. But because the villain itself.. is their self.