Yamamoto feels the stiffening but he remains patient, loving, and attentive. Plus the shiver and smirk give enough away, Hayato finds it pleasant at the least and he is taking advantage of the tipped head to give just one teasing nip to the other's neck.

"Oh? Then why don't you?" He is teasing, he is also strolling out of the room now, heading for the shower, the words tossed playfully over his shoulder. He does not bother gathering clean clothes as he strips out of his dirty ones and puts them aside, he does grab a towel before heading in to clean up from work.