Only Nine Days

I am a ghost who secretly ran to the human world before reincarnation, hoping to fall in love again with my girlfriend who was still in the human world. I only have nine days. I inhabited the human body and approached, accompanied, and dated my ex-girlfriend as a stranger, but it was unsuccessful. He decided to tell her the whole truth and then fall in love with her with his true face. However, love is happy, nine days is short-lived, and after nine days there will be eternal separation. This means that my girlfriend will be sad and painful again, and I can't bear it. Instead, I helped her find a boyfriend so that someone could take care of her when I'm gone. Searching, testing, selecting, and after many twists and turns, found one that suits her. But she didn't accept it. I was surprised to find that she was unwilling to accept a new boyfriend because she couldn't forget her dead boyfriend. She couldn't forget me. But we can't always be like this, alone for the rest of our lives. So, I tried every means to make her forget about me. Various methods were used to downplay me, vilify me, and even slander me. If you can't forget it, you'll feel disgusted. Exposing or falsifying all my bad deeds disgusted her. My purpose: to make her think that it is not worth being attached to me anymore, so that she can accept a new boyfriend and no longer be alone. Later, it worked. On the last day of farewell, she and her new boyfriend were happy, while I left quietly.