We Were Once Taught by the Space Police That Youth is to Not Look Back
After waking up from a dream about his childhood, Hayate talks with Maria about having dreams to live for and believes that dreams in life are very important. After revealing a childhood dream of his, Hayate gets the day off and decides to visit his old high school. There, he meets one of his old classmates, Ayumu Nishizawa, who has a crush on him. Hayate finds out that his parents took the rest of his tuition money, leaving him without a high school to go back too. After he begins to leave, Ayumu confesses her love for him, but he turns her down. Later, Ayumu gets taken into the ground of Nagi's mansion under the pretense that Hayate was being held captive by yakuza.
Aired 17/06/2007EP 12 - We Were Once Taught by the Space Police That Youth is to Not Look Back

Hayate the Combat Butler
Hayate Ayasaki's life wasn't great, but when he loses the job he used to support his good-for-nothing family, and his deadbeat parents sell him to the Yakuza for cash, it really hits rock bottom! Faced with having to pay off the huge debt before he's converted into black market organ parts, a desperate Hayate decides to kidnap oddball heiress Nagi Sanzenin for ransom... but when even that goes wrong and he accidentally ends up rescuing Nagi from other kidnappers, it turns out that Hayate is the bodyguard that Nagi has been looking for! So now he's the Sanzenin family's butler, and… maybe… it might be the start of a potential romantic relationship… assuming Hayate can survive the on-the-job training, of course.
(Source: Sentai Filmworks)