"Holy shit," he says almost involuntarily as the combination of the teeth and Yu's hand hit him at just the right time. The feeling of being pampered like this, Yu being the one that is making him feel so unbelievably good, it starts to bring him closer and closer to his breaking point.

He doesn't want the favor to go without being returned, of course, and now he finally gathers the courage to let a hand slip down onto his partner's own button. He looks at Yu silently, asking for permission, and asking for Yu to let his hand go underneath the fabric of his own pants and underwear. It would feel better, and in fact, he wouldn't mind if the pants just disappeared for some reason.