[Crossover] Ritsuka Fujimaru Knows Nothing

According to observations by the Human Order Continuation Assurance Organization, Chaldea, humanity's future will come to an end in 2016. Why? How could this happen? Who did it? What did they do? Forty-eight Masters were recruited to Chaldea to take part in a plan to travel through time and discover the cause of humanity's extinction. "So, yeah, that's basically the setting. This prank was amazing! They actually sent me all the way to Antarctica!" After finishing a weeklong summer trip to Antarctica, a girl returned to Japan and made the above comment. Her cousin, a psychic who had listened to her, replied: [It wasn't that elaborate a prank. You just got lucky, silly.] Humanity's incineration was halted in its final hour before it could be carried out, ensuring that the next hundred years of human history would be safe and sound. The protagonist responsible for all of it knew nothing about what had happened.