Hayate has Three Kings, DIamond, Spade and Clover.
But during the battle, what Astra had observed was of him using water, the element for the Heart shape.
Something he shouldn't have been able to use.
He must have become careless because it was already closing in to the final battle.
Hayate was still looking at them in disbelief but after realizing the mistake he had comitted, the disbelief and betrayal in his face changed into that of a smirk.
"I completely forgot, there is someone here who is very much observant. Though I didn't expect for you to arrive here so fast."
That gentle face Hayate always had was now gone, it was replaced with a devil like look.
Soon his numbers changed, from three kings to four nines.
"You-"
Osamu was very much angry but he has no idea how to say it or how to really react.