Izuku is actually fairly calmed by that last bit, not seeing to be bothered by the irritable look. He's getting used to it; it's just how Bakugou is, in his book, and it's never seemed to actually denote any change in his level of faith in him.

In fact, he seems more irritated that Izuku isn't rising up to the faith Bakugou is putting in him currently. So he takes a moment, and he breathes, and he nods.

"... Alright. Just hand to hand, right?"

Izuku moves carefully into stance, and Bakugou will at least be pleased that he's well-centered. When he started out, he was garbage at this. At least he has it together now.