Xenoverse: Starting from Looking at Another Me

I bumped into "another self" at the beginning. I thought it was just a coincidence. Until her eyes flashed with the desire to "eat you"—— I panicked, and so did she. What's even more outrageous is that a group of outside "investigators" told us: This school is a "copy" and we are the "source of pollution". The world is about to end, we have to choose one of the two to survive? Me: "How about... Cooperation?" Her: "Let me take a bite first."