Hayate no Gotoku!

Synopsis

Nagi is planning a celebration party for Hayate for graduating, though gets to stay out of the mansion for a while by giving him the task of retrieving a small box carrying an item she bought off the Internet. While out, Hayate is offered 150 million yen by national escort service in order to recruit him into their business and so that he can pay off his debt to Nagi. While thinking this offer over, he loses the box and has to go halfway around the world in order to retrieve it, though by the time he gets back to the mansion it's already dark out. A light flashes and Hayate saw the "Arc de Triumph", only with the banners congratulating him for his passing grade. Everyone has been expecting Hayate to show up, and the item he retrieved which was intended for him, and turned out to be a small rich pocket watch. Hayate is very grateful to Nagi for the party when she tells him that money is not just what keeps them together but wants to be with him for an eternity, and he hugs her in tears of joy. Hayate later turns down the offer from the escort service, and it turns out that Mikado set up the offer in order to test Hayate's loyalty and is still worthy of owning the pendant (King's Stone). The next day, Hayate and Nagi go on a bicycle ride, both happy with each other having been a year since they met.

(Source: Wikipedia)