In fact, many times, I would think of those days in the university campus 6 or 7 years ago. At that time, I did not understand what lust was. Maybe it was not as lonely as it is in my memory. The origin of all cause and effect was that day. On that day, we were all about to graduate. It was a problem for undergraduate medical students to find a job after graduation, so I decided to take the postgraduate entrance examination and found a tutor. The story began between my tutor and me. Later, I chose to directly pursue a Ph.D under the guidance of this tutor. This should have been a beautiful story, but never did I expect that it was the beginning of the tragedy.