Kakashi looked up at the sound of Yamato's voice, immediately catching sight of the flush on Yamato's cheeks and wilting. He was suddenly a little too aware of what a state of undress he was in and quickly swallowed his response to wrap arms around himself instead, shielding a portion of that rarely-seen skin and the scar mattering his side.

"Sorry," he muttered, an awkward laugh bubbling out of him as he gestured with his other hand to the now boiling water. "You, uh.. You weren't meant to wake up just yet."