Natsuki accompanies Atri who is on her way to school. However, when they arrive, they find that most of the school is underwater. Although they managed to get into the school building, inside it was full of empty classrooms and an unexpected teacher. There, Natsuki is faced with the saddening reality of the lives of the people who remained in their town.
You see, I'm actually a battle robot 
that a certain country secretly made.
أنا روبوت مُقاتل صنعه بلدٌ ما سرّاً
Um ehrlich zu sein, bin ich ein im Ausland
heimlich entwickelter … Kriegsroboter!
Soy un robot de combate
que desarrolló en secreto cierto país.
Soy un robot de combate
que desarrolló en secreto cierto país.
Je suis un robot militaire
ayant été fabriqué en secret
La verità è che io...
Na verdade, eu sou um robô de combate
criado em segredo por um certo país.
По правде сказать, одно государство втайне
создало меня в военных целях.