On a snowy night, I picked up a white fox covered in wounds. It turned into a human form and begged me to take it in. It said that it was a thousand-year-old fox demon and was being hunted by its enemies. I was an ordinary college student, but I was forced to get involved in the disputes in the demon world. I never expected that this fox was actually the prince of the demon world who had been missing for many years. He said he wanted to repay his kindness, but every night he turned into a beautiful man and crawled into my bed: "I owe you the favor of saving my life."