A talented woodcutter enters a forbidden forest and is assaulted by a monster crab.  An old man is famous for being rough on his servants. Since nobody wants to work for him, he hires monsters.  An old man gives a rat a rice ball, and as thanks is taken to a magical world.
The monster only shows up at night, 
so there's so much work to do.
El monstruo solo aparece de noche, 
así que tiene mucho que hacer.
El monstruo solo aparece de noche, 
así que tiene mucho que hacer.
O monstro só aparece à noite, 
então tem muita coisa a fazer.