Shiru wants to do good deeds every day but wants low risk, high reward.   Then the girls play a game that will change them forever.  Finally, they peak into another word.
of getting his memory back by 
looking out the train window,
de recuperar su memoria mirando por la ventana
que estuviera a punto de recuperar su memoria mirando por la ventana
a recuperar a sua memória
 olhando pela janela do trem