Passion Yuuki Yuuna wa yuusha de aru : Season 1 Episode 11

Learning Mimori is at the center of the Vertex outbreak, Yuna and Karin chase after her into the barrier, learning what Mimori herself had learned. Before they can try to reason with Mimori, who believes destroying the Shinju is the only way to spare her friends from suffering, Yuna and Karin are forced to retreat from the Vertex.