Hayate no Gotoku! Can't Take My Eyes Off You - episode 10 - 05 Dec, 2012

Nagi inquires the woman about why she wants the Black Camellia, saying that it is a magical sword that grants eternity. When Hayate got stabbed by it he collapses and later gets up, however, his personality seems to have changed. The woman and the tree appear and attempt to take the Black Camellia. The thieves try to fight back as their hideout catches fire and escapes with Yukiji's money. Hayate wants to talk to the woman, but Isumi interrupts them and releases Nagi. The woman, Dolly, starts to weaken and retreats with Shidou and Ruri. As the police arrive, Nagi becomes concerned about Hayate’s behavior, and then Hayate tells her that he "quits" being her butler, leaving Nagi behind. The next day, Nagi pretends to be okay without Hayate. They meet Kyonosuke with a new car saying Yukiji will pay him back for it, as he isn't aware that she has been robbed. Kyonosuke takes Nagi and Ayumu on a drive to Area 51 when Ayumu shows Nagi the Black Camellia she found last night. Then the car tire suddenly blows causing it to crash. Kyonosuke and Ayumu leave Nagi alone in the desert while looking for help. Despite shouting "HAYATE!" he doesn't show up. Nagi then starts to realize how important Hayate was to her and exclaims that she wants him back no matter what. Ayumu comes back and gives Nagi a helping hand. Meanwhile, Hayate is minding his own business when Yukiji gets him to find her money by interrogating a thief that she caught. Hayate (speaking English) reluctantly threatens the thief who gives them the location at the Starside Hotel. (Source: Wikipedia)