For his whole life, Buck has struggled with insomnia, and with all the stress and trauma he deals with as a firefighter, things haven't gotten better. Finally, however, his doctor has prescribed him a sleeping medication to use- off shift only- so he can get some rest and quit running him into the ground. Eddie is happy for him, obviously, but there's more to it than that. After Buck's first good night's sleep in years, he sat Eddie down and explained to him what he wanted.
"This stuff knocks me out," he had said. "I'm dead to the world. You could do anything, and it probably wouldn't wake me up."
Which led to a thorough discussion, and now, to Eddie walking into their bedroom about an hour after Buck passed out. He looks so peaceful when he's actually sleeping. His face is completely blank, lips parted, hair messy and a little curly. He's not even clothed, in preparation for tonight, so Eddie gets to admire his bare ass and soft cock against his thigh.
He can't help the way the sight and accompanying thoughts make him hard as rock. There's so much he wants to do, but for now, he'll start simple. He slides into bed next to Buck, already naked as well, and takes his cock in hand. He taps the spongey head against Buck's slack lips. They're so warm and soft. In his sleep, Buck sniffles, but doesn't move at all.
Slowly, Eddie guides himself into Buck's mouth. It's so hot and wet, and Buck's tongue flutters against the base. Eddie swears under his breath and threads his hands through Buck's hair and guides him, careful not to push in too deep.
As he fucks his mouth, Eddie gets more confident. Buck has barely stirred at all. He starts to force him to take more, grinding his hips up into Buck's mouth so that he can feel the back of his throat fluttering around his cock. This is the point where Buck whines a little and furrows his brow, but he still remains adrift.
Eddie glances down to see that Buck has managed to get hard just from this. He must be dreaming of Eddie, he thinks smugly, because even asleep he loves to be used.
it doesn't take long for Eddie to be close. He won't come inside Buck, too concerned with choking him, so at the last moment, he pulls out and comes on his face, marking him up with concrete proof of what's happened.
Before Eddie falls asleep, he decides to leave the mess for Buck to feel come morning.