The principal adores his grandson very much and asks the Sket-dan to prepare a picture play to entertain him. They decide to base the story off of Momotaro, but change things up from the usual... Afterwards, he asks them to play with his grandson for an afternoon, but the kid doesn't seem interested in having fun at all.
is to have the courage to break 
down the door completely.
es tener el coraje de romper con 
el pasado y abrir nuevas puertas.
es tener la valentía de romper con 
el pasado y abrir nuevas puertas.
é ter a coragem de destruir
 a porta completamente.