Chapter 1: Acception

The legendary Ex. Corporal Athena R. Kino has been shot and killed. Levi and the rest of the group has successfully escaped to the Failed Walls, it's been two whole years since she's been gone. Now a mysterious girl Ryeo K. Asenic has shown up for no reason and the strange thing is, she looks, act and responds exactly like the deceased Athena. Levi is suspicious and wants to get to the bottom of it, what really happened to Athena that day after the Military Police took her away?