Ianto took in a long breath as he woke up, both at the shaking of his shoulder and at the shifting. Almost immediately, he did notice the change in the water temperature, and had to wonder how long Sulu had humored him and let him sleep there. He raised a hand to rub at his eyes, and judging by the state of his fingers and how they weren't completely pruning, it couldn't have been too long. The water was getting cooler, however, and they should probably get out before it started having the reverse effect on him than why they'd got in in the first place.

"...yeah," he said, his voice a bit rough, given the fact that he'd just woken up from a surprisingly deep sleep, really, given the situation and short amount of time it'd been. "Alright." He put his hands on the sides of the tub and carefully shifted until he was sitting up straight, needing a moment before he even thought of attempting to stand. "Sorry," he mumbled, apologizing for falling asleep, but more out of habit than really because he felt all that bad about having done so.