You climbed the mountain early today. Why? You're not exactly sure. But you were up there when something in the classroom exploded and something flew very quickly through the window, breaking one of the glass panels in the process.

Looking in, you can see Karma, Nakamura, and Rena up to their usual shenanigans. Only this time, they've somehow managed to drag Nagisa, Okuda, and (Crush) [if they aren't already there] into this.

What do you do?