The students go to school only to find out that it's been shut down by the government, and Saku's sister's condition suddenly worsens. Meanwhile, Keishi does everything he can to save his friends.
What if a door I came through
disappeared when I looked back?
ماذا لو ممرت من باب ولكن 
عندما استدرت لأراه اختفى؟
Was, wenn eine Tür, durch die man gekommen
ist, plötzlich hinter einem verschwindet?
Si atravesé una puerta y al voltear,
E se uma porta pela qual entrei
desaparecesse quando eu olhasse para trás?