Though from what Ray had explained and he understood, he could easily back down from the tasks, if he knowingly backed down and lost the first task itself. But then he looked at the boy, and thought that it would then get difficult for him. So at the end, Karl just decided to get going with the flow and gladly take what the universe was offering him. At the end, it may help him with a lot.
Then seeing that Hans wasn't moving, Karl called and said, "Butler Hans, get the third room on this floor ready. Ray will stay there."
Hans' forehead furrowed ever so slightly, and he said ever so hesitantly, "Master, I don't wish to offend you. But the little boy…?" He wanted to know who is he?! After all, he never want to see anything happen to Karl, and was not ready to compromise anything with his safety.