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.”
After all, we humans are apes put in a cage called Earth.
A fin de cuentas, los humanos somos simios 
encerrados en una jaula llamada Tierra.
Afinal, humanos são primatas
 numa gaiola chamada terra.