Hayate no Gotoku! CAN'T TAKE MY EYES OFF YOU Episode 11 - The Eleventh Night aired on December 12th 2012.
Everyone gathers together to help Nagi search for Hayate. The girls try to figure out the mystery of the Kurotsubaki, Dolly, The incident 13 years ago, and Hayate’s strange behavior. After Izumi and Hinagiku mention that Hayate got stabbed the previous night, Nagi remembered something what Yukariko said about her father, and comes to a conclusion. Ruri appears and Nagi asks for her to bring her Dolly’s ring; Hayate’s life depends on it. Nagi orders Klaus to deliver her mother's wedding ring over immediately then loans it to her friend, Ruka Suirenji, So Hayate will notice the ring on Ruka’s finger during her TV interview. Ruri found Dolly's ring and receive an email to meet at Ruka's concert at the Starside Hotel, Nagi’s friends go there to enjoy the show. Hayate and Yukiji arrive at the hotel, Hayate goes into Ruka’s dressing room and finds a note written by Nagi informing him that the ring is at the upper floor at the wedding hall. In the wedding hall, Nagi reveals the Kurotsubaki is a sword that exchanges a person’s soul and what happened 13 years ago, and thus Hayate is now Shin Hayek, Nagi’s father. Shin sat down with Nagi and talk about Yukariko. Dolly shows up with a captured Ruri and demands the Kurotsubaki, but Nagi and Shin explain that her beloved "King" died 13 years ago and Hayate is inside the clock now. Shin claims his ring back that signifies his and Yukariko’s eternal love. While Yukiji beats up the thieves, chaos rises above her and Maria caused by Dolly refusing to believe her king is dead.
The aircraft used in delivering Yukariko's wedding ring is an SR-71 Blackbird. It is ironic because the SR-71 is only used by NASA for research, but used in the Cold War as a Recon aircraft.