Night Class. I absolutely love night class when others perfectly hate it to death. It's Science tonight, afterall. My favourite subject. Around 8pm, the teacher walked in. He's Mr. Jun.

"Class, do the practice in 67, 69, and 71 worksheets. Send me by tonight. And Jongdae..." the teacher paused.

"Nae, ssaem." I stand up.

"Can you go to office and take the class workbooks?"

"Okay." I answered, then make my way to the office. But there's nothing weird with the way. The floor was cracked. Old crack. Being curious, I put my glasses on. And weirdly, everything went normal back. I look around.

Wait.

What's that?

I noticed a fleet of stairs, leading to the fourth floor. I poked my head the the side.

I can't believe what I've saw...

What I saw was, when I look up, the floor kept increasing to the fifth, sixth, seventh, eighth, nineth, tenth and so on. Feared on what happened, I ran back to my class, which was only few meters away where I'm standing. To be more shocking, there's nothing behind me. Not a class, just dead end.

"Everyone!! Guys?!! WHERE ARE YOU?!!" panicked, I began to shout their name.

"Hey." something patted my shoulder.