"Because there's no other explanation," Tamaki explained. "We're all real. And so many of us come from different worlds and different times, there isn't any other way to explain it." It was just simple logic, really. Of course they were all real, why wouldn't they be? And Tamaki knew that for a fact because you couldn't kiss not-real people. And not-real vampires couldn't leave a mark on your neck. And not-real girls didn't make you....

Well, feel very nice indeed, to put it politely.