Kevin makes a noise of disapproval as Crowley hauls him around, but he doesn't do anything to resist. Crowley is free to position him so that Kevin's ass is spread over his face. His hole clenches sweetly around nothing, like it misses his cock.
If no one got the chance to fuck him before today, then he's willing to bet no one has done this either.
"Shit," Kevin gasps. The worst choice of swear when Crowley's wiggling his tongue into his ass, but he's forgiven for how good he tastes, the way he leaks Crowley's come onto his tongue. Crowley holds back a smile to better purse his lips against Kevin's rim. Kevin scrambles to brace himself, his hands sliding over Crowley's chest, and Crowley reaches for them. He shows Kevin how to hold himself open, freeing Crowley to push a finger in with his tongue. He licks shallowly; he sinks deep to the knuckle to fill Kevin back up.
Kevin rocks back. Crowley's other hand sneaks around to stroke his half-hard cock. Kevin should wring the most out of his overeager body while he's still young, and Crowley is going to make sure he enjoys every minute of it.