Hayate`s First Kiss

One day in the Sanzenin mansion Hayate has been asked by Maria to buy food but on the way. He saw Hinagiku with her sister Yukiji buying bears and juices. They saw Hayate buying food and then Hinagiku tapped his back .and said why are you here Hayate said I am buying food for the mistress. Hinagiku said i`ll help you Hayate then he said thank you Hinagiku. Then Hinagiku gave the bears to her sister and said Yukiji you return this back to the house .Yukiji said okay sis she returned back to there house after she got back it started to rain Hayate and Hinagiku went to find a house but then they found a abandoned house nearby .

What will happen to them in the abandoned house