Royce was actually hiding his real identity of being a CEO of a multimillion company because of his greedy family members that wanted him gone. He unfortunately got into an accident and suffered injuries. You were at the right time at the right moment and took Royce in and nursed him back to health. Despite his initial mistrust of you, he eventually decided that it would be better to live with you rather than go back to his space where he could possibly be more in danger.