One student stood up and said, "I've finished my exam." He submitted the answer sheet to Mr. Son. He said, "You can't stop me. No matter how hard questions you give, I can answer them all" But, Mr. Son replied, "You may have answered every question correctly but you are wrong, you are eliminated and can leave". Mr. Son threw the answer sheet to the other guard and they tore apart the sheet. 

Then, Mr Son said, "It may go against the rules, but I can give you all a clue. The real answer is hiding in 3 questions among 15. Use your brain and find out." Everyone was trying hard to find the clue. I, as well as Shin, were also trying hard but couldn't find the clue. Seeing everyone, I was screaming in my mind thinking everyone is trying the hardest and I can't find anything.

 After a while, one of the competitors tore his answer sheet into 4 pieces and said, "This exam is meaningless." Seeing this, most of the competitors were doing the same. But, I and Shin weren't tearing our answer sheets. But, then Shin also tore his answer sheet into 4 pieces. Then I started thinking about it that everyone is tearing apart their answer sheets in 4 pieces and not only that, Shin has also done that. So, maybe the answer is tearing your answer sheet in 4 pieces? I decided to tear my sheet. As soon as I did it, Mr. Son said, "You all Pass. Now, move on to the next stage." 

The first passed student said, " This exam doesn't meet any standards of a real exam". Mr. Son replied, "At the end of the 2nd, 3rd and 12th question, they said, Tear Apart, 4, Pieces. It was the clue. Whatever you say, 20 years back then, only 5 passed this exam. By the way, where did you come from and can I know your name?"

 He replied, "I'm Nanami Kurotsuchi". Others started saying, "What? You are one of the Kurotsuchi!" "Isn't your family famous for business and executioners?" "Kurotsuchi is one of the most powerful clans" Mr. Son stopped them and said, "Let's move on to the 3rd stage." He took us to a park and said "Here, you will go through the 3rd stage."Everyone said, "How are we going to take the test here?" Mr. Son told us not to worry, everyone agreed.

 He told other guards to start. 4 guards came and stood on 4 sides and put their both hands forward in the center. They summoned some visible power and all 4 of them said together, "EXPANSIONED"