"I w-aah- I will-" Billy managed to promise, lips parted as he gulped down air, looking down at him in awe. His fingers briefly tightened in Bucky's hair at the initial shock of pleasure, though they quickly loosened again, a few apologetic strokes attempting to make amends.

His hips gave a slow roll, fighting with himself not to jerk forward, grateful for the support of the wall, and Bucky's quick thinking. "Y-you look- hh- you look amazing-"