I am just a bad student, at best an unlucky bad student. But there should be a limit to misfortune! Who told me that it was so rare for me to be so naive and hand in a blank paper that I ended up in such an inhospitable place and even got a good roommate as a gift. But this time travel seems to be no accident. Who is the original "Xiao Ming" and where has he gone? And can I go back? I controlled a person for twelve years. Finally, I replaced him and gained freedom. In this world of human warmth and warmth, I can live a better life on his behalf. But there are numerous doubts from all sides and he is pressing harder and harder. Did I really do something wrong? But I don't want to leave the person who trusts me the most so quickly, but is he really trusting me?