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Seita was picking pockets to see Hinowa, the highest-ranked ??/Yujo (courtesans/ prostitute) in the underground ??/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."