There's a certain art to this technique of contrasts. Hot and cool; gentle and rough. Yukimura sucks in a breath and instinctively pulls taut against Akaya's back at the bite. He knew it was coming, because he knows Akaya. That takes nothing from the effect of it, that tingle in his spine from the mingling sensations of pain and pleasure, and the way it makes him feel almost lightheaded. He rewards Akaya with a low moan.