Mariano hit his first league double of the season in Real Madrid's 3-2 win over Villarreal.
"I am very happy for having won at home and on top of that, scoring," said the striker who Madrid brought back from Lyon this season. He has three goals in 13 matches in the top flight.
"We enjoyed it and the fans too, which is the important thing, even though the final score wasn't great.
"They netted but we were good too and we had the ball. We're very happy for the win and the fans received it well.
"I don't have a crystal ball but I want to stay (at Madrid). I am very happy and let's see what happens going forward."