The recluse son of the Mashiroi Gang boss, Kaguzo, is hiding a shocking secret! Upon hearing the details, Gintoki points his sword at Nakamura. Attacked by retaliating gang members, Gintoki escapes and hides. Kaguzo collapses due to illness and the Mashiroi gang’s successor will soon be announced. Just as Nakamura is about to be crowned as Kaguzo’s successor, Gintoki suddenly barges onto the scene…
That's why Gin-san accepted this
job. I'm sure that's how it was.
Por eso Gin-san aceptó el pedido.
Por isso que o Gin aceitou o serviço. 
Tenho certeza que foi isso.