Shinpachi returns home with a gift for his sister—a doll that oddly resembles Elizabeth, with the name “Space Monster Stefan” printed on its chest. But what awaits Shinpachi is a deadly naginata swing by the raged Otae. While Shinpachi narrowly dodges the attack, Stefan falls prey to the naginata. As she tears Stefan apart, Otae explains the reason behind her fit. It appears the panty thief who’s recently been stirring things up in Edo city stole her panties. To soothe her sister’s anger, Shinpachi decides to ask for help from Gintoki.
That means the thief thinks you're a loser who can't get girls. How pathetic!
Eso significa que el ladrón cree que eres 
un perdedor que no liga. Eres patético.
Isso quer dizer que ele te acha um 
fracassado sem mulheres.