Shiroe, Naotsugu, and Akatsuki reach the northern city of Susukino, and safely meet Serara.  With the help of the mysterious swashbuckler Nyanta, they plot to leave Susukino.  But the evil guild Brigantia wants to stop them.  The high-level monk Demikas attacks them.  Can they overcome the odds?
That must be why Naotsugu 
used Castle of Stone.
Por eso Naotsugu 
usó Castle of Stone.
Dev'essere per questo che Naotsugu 
ha usato Castle of Stone.
Deve ser por isso que o
Naotsugu usou Castle of Stone,
Думаю, Наоцугу знал, что они задумали,
поэтому использовал «Каменную крепость».