There was only a upper and lower bed which is small, old. Obviously, It was stole from a certain school.

Amy was not used to sleep upper, so I let her sleep in the lower one. We are good friends, after all.

We didn't care too much of the bad condition we live. As long as we have a place to sleep after we go back from work. That's ok!

You know, recently, thousands of undergraduates were rushing in to cities to find jobs. We were one of them. So during the two years' time, life is hard. Our bossed were caring to us. Because we were just two common undergraduates.

Amy's boss was more caring. She couldn't come back before 12 o'clock.. I was often waken by the sound when Amy came back. I have get used of it. Later I even couldn't fall asleep without her sound.

She often go to meet her boyfriend, but she would come back within three days. Because she had to work, or she boss would fire her.

But this time, she hasn't come back for one week. What happened to her? Why didn't she contact me? I began to worry about her. She always came back within three days. I sent messages to her, but no reply. I called her, but couldn't get through.

Tonight, I was just falling asleep, the sound of short message broke out. Was it hers?

I can't wait to open it. It is hers. But it only read, "good friends, back to back."

I frowned and signed deeply. She was playing game with me. Gladly, I dialed her number, but only heard, "the number you dialed couldn't get through, please dial it later." I had no idea. So I sent message to her, "where are you recently, get fired by your boss?" later, I got a reply. But also that sentence, "good friends, back to back."

I was too tired to play with her. So I silenced my cell-phone to sleep. I fell asleep soon, but suddenly I opened my eyes, the blue lights of my cell-phone were shining like an uneasy eye. It was Amy. I thought she must have some important thing to tell me. So I got on right away. But she just repeated, "good friends. back to back." I was frightened by that sound. Amy was a quite girl, she had never that naughty to play games with me. I was lost into my thought, suddenly she cried hysterically（歇斯底里地） , "good-friends-back-to-back". I was really scared and my cell-phone fell down to the ground. I went down from my upper bed to pick up my cell-phone. Amy didn't dial any more. But what' up just now? I trembled and dared not to dial again. That sound was frightening. I couldn't imagine Amy should… At this time, I felt a droplet dropped on my neck.. It's a kind of black, pasting（裱糊） liquid. What's more, the bed sheet was full of this kind of black, pasting and mystery liquid. Panic fulfill my heart and I can't even breathe.

I turned my neck up to find what was on my head. That's just a simple bed. Everyday I sleep upper but never took notice of the back of my bed.

Amy's widely opened eyes, half opened lips fulfilled my eyes. Her legs and arms were firmly nailed under my bed.

Meanwhile, another black liquid dropped from one of the nails to my cell-phone's screen.

The screen lightened again, "good friends, back to back."