When the episode started and they talked about the
collapse ability and psycho box cutter girl gave imouto that evil look, I thought that she was the one with the power, not the sister. And I didn't interpret collapse as actually making things break but making people fall sick and stuff. That made sense in my mind as to why the sister was sick. Guess not. And I wonder who that duo with the blue haired glasses guy in the car and the orange haired girl who said she was too late is. And I wonder why the eternally soaked guy showed up at the end.