Takeru Amaya.

The terrible will of the gods. Every school day began the same way, until two boys decided their lives were too boring. The next day, terrible things began to happen. The school held life-or-death trials, and by the end of the last one, five people remained, with only two ultimately surviving: Takeru Amaya and Shun Takahata. They had a...strange relationship, so to speak. Shun Takahata considered Amaya Takeru a psychopath, since he killed students without reason. And Takeru Amaya showed strange signs of attention toward Shun Takahata. For example, during one trial, the question was, "Do you love Shun Takahata, yes or no?" To which Amaya answered, "Yes. "

The entire event took place in a large, enclosed cube above central Japan, with a ton of people underneath, including police, special forces, and so on. After completing the cube, two guys found themselves on the roof while adults shouted something at them and launched helicopters.