Seita was picking pockets to see Hinowa, the highest-ranked 遊女/Yujo (courtesans/ prostitute) in the underground 遊郭/Yukaku (Licensed Quarters) Yoshiwara Tougenkyo, where law has no meaning. But his picking act was all for the sake of seeing the mother he was separated from at a young age. To let Seita see Hinowa, Gintoki and the gang march into Yoshiwara Tougenkyo, where they receive a rough welcome by Tsukuyo – the head of Yoshiwara’s paramilitary force, “Hyakka.”
I only learned this after I was sold here.
Lo aprendí después de 
que me vendieran a mí.
Só descobri isso depois que 
me venderam para cá.