If talk about “Ghost”

I always think about my sister “AI”. She had just met the strange story in her apartment. AI stayed at forth floor apartment in Sukumvit. She said that yesterday she had an argument with her boyfriend who stayed with her in this apartment. So they separated the room to sleep. In the morning, He asked her that “last night you wanted to come to sleep at me, didn’t you. I heard you tried to open the door many times.” AI was very surprised because she slept tight all night. She didn’t go out from her room. So AI came to ask me an advice “How can I chase ghost from y apartment.” She was serious, so I told her to put a small Buddhist sculpture. She put it on the refrigerator but her boyfriend was Christian. So, he doesn’t want Buddhist sculpture but she hides it by he doesn’t know because she fear the ghost very much.
Once day, I used to go to have lunch at AI’s apartment. After I finished lunch, I went to kitchen for cleaning dishes while AI sat in the kitchen. I heard some sound like women was humming near me. I thought today AI might be happy because she humming. After I washed dished, I asked her what the song was she shake her face and refused that she didn’t sing a song or hummed. So I opened the window to look where the sound came. But nothing, about 5-10 minute I heard that sound again and it was very close to me. I really sure that the ghost.
But now, AI doesn’t stay at her apartment. She went to Japan. There are my friend rents this apartment from her. She is Mew. Mew said to me that “I think, there is a ghost in this room because last night when I was sleeping. Here was something lied on me. I couldn’t move any more.” So, that were me very quite sure that there is the ghost in this room.
After that, she takes her brother live this room together. Her brother must stay in Bangkok because He changes the class from high school to University. I don’t know how they will cope with this situation and I wonder “Mew allow giving the ghost live with her how when the ghost doesn’t share money for room.” (The ghost was bad roommate.) (>v<)