His tongue tastes his skin, teeth scraping against the thin sensitive neck. He's grinding into the geek, a thin layer of his boxers the only thing between him. He grunts before wrapping slim legs around his hips.

His fingers search in haste for the tight ring of muscle needing attention. The asset moans greedily when a thick finger enters him and he's pulled into a passionate kiss. Two fingers and the younger man's tongue is at his lips. He opens to him and devours him in the kiss. Tongues battling, tasting. Three fingers and the brown eyed man screams out, lips parting as his hips thrusting back. He's found that bundle of nerves and thin fingers are clawing at the sheets.

"Casey, need you, please." His voice is dripping with lust, teeth biting his lip to hold back the groans.

Who is he to deny him? He swears when he's entering the tight heat, nearly losing it there. He's kissing the younger man again, gentle this time. He enjoys the feeling of the man's soft lips, the feel of his tongue just barely brushing his.

"Casey." Chuck's voice is different now, less passion more...normal. He also smells grape soda. That wakes him with a start, hand going for his gun... that isn't there. It takes him a second to realize he's fallen asleep in the break room. Chuck is looking at him with his arms folded, but he looks slightly amused.

"Having a good dream?" The younger man is smiling at him, if only he knew. Casey shifts himself, hoping the other wouldn't notice how good of a dream he was having. This had been happening a lot lately and it was turning into a problem. Every time he saw he asset he wanted to jump him, and not in an aggressive way.

"What do you want Bartowski?" He growls in response. He knew what he wanted. An image of Chuck moaning as he fucks him against the soda machine. Christ he needed to get over this.

"Your break was up an hour ago, better get out there before Big Mike notices." The geek claps a hand on his shoulder before he turns to walk out. Casey breathes in, trying to ignore the intoxicating smell of his asset. He grunts, which causes Chuck to turn around, looking confused.

"Don't think I've heard that one before, you OK?" Chucks steps in closer to him. He reaches up to touch him but Casey grabs his wrist. He holds on to it a second too long and Chuck gives him a look.

"I'm fine." He makes his tone slightly aggressive hoping the asset will back off. Chuck puts his hands up in surrender.

"Alright, geez." He says before walking out of the room, leaving Casey to his own thoughts. He had two choices. Either suppress his emotions or just fucks him and hopes it's out of system. He knew neither would work, but he was going to do his best to ignore it.

It didn't get any easier when Sarah's relocated and a new CIA agent assigned to the mission. He wasn't told all the details, but what he knew was the NSA was unhappy with how close to blonde was getting to the asset. They put her on some undercover mission in Brazil.

They issued a new pretty female CIA agent, this one brunette. She's manipulative, cocky and worst of all green. She scored top marks, but she is still fresh out of training. This is only her second mission. He figured she would become the new 'girlfriend' for Chuck, but he was surprised when they told him he was going to be Chucks new love interest. The new CIA agent is only being used for back up and surveillance. She's working at Wienerlicious to make spying on the asset easier. He's just fine having the asset all to himself.

Apparently the NSA wanted their agent to be the one closest to the asset. With himself as Chuck's his lover it would be easier for surveillance and the asset already trusted him, a little. It would make matters easier if his damned feelings weren't getting in the way. He laughs at the thought. He, John Casey, has lady feelings for that damned moron.

He hasn't told Chuck about the change in cover story yet. He'd been waiting mostly because he's having a hard time being alone in a room with him. He used to want to kill him, now he just wants him. He was getting sick of his dick being half-mast around the kid.

So, he does the one thing that helps him clear his mind once he was in his apartment. He cleans his guns, all 43 of them. Once he finishes he looks over at the cameras. Chuck's just getting home and Ellie is curled up on the couch with a book. He waits until the geek is in his room before heading over. When he knocks on the window the asset jumps and curses as he turned around.

"Haven't you heard of a front door?!" His tone is higher, distressed. Casey's eyes wander to the open Nerd Herd shirt, smooth skin teasing. He tries to look away when Chuck bends down to grab a shirt from his draw. He admires the curve of his ass. Yup, cleaning his gun did nothing to help him focus. Fuck.

He watches as he strips his shirt. Chuck has a thin build, slight lean muscles with just a dusting of hair. The man should be more out of shape with his lack of activity... and diet. Chuck clears his throat when his gaze has lingered too long.

"Up here big guy." He has a smile on his face as he puts on his t shirt. He makes no move to change his pants, pity.

"Sarah's been relocated." He notices the flash of confusion and hurt that crosses Chuck's features. He rolls his eyes. It hadn't even been long enough for most normal people to get attached. Damn sensitive idiot.

"You have a new cover boyfriend." He tries to say it quick enough, hoping the asset is still stunned by the news of Sarah. He is secretly glad the blonde is out of the picture. He was getting sick of the doe eyes the kid had around her. It wasn't jealously... definitely not.

"Sarah... what happened?" Chuck asks. Then he can see the gear turning in the geeks head. "Wait, boyfriend?" Chuck has no history of gay relations but the agency is going to try for it anyway. Not like he has much of a choice if he protests.

"But I'm not even gay! Well there was the one guy..." Chuck babbles but stops himself short. "Who?" When Casey didn't answer Chuck asks again.

"Me." He keeps eye contact, needing to know the reaction. Chuck's eyes go wide, mouth open in shock and then the look changes, like he's weighing options in his head.

"Why?" He looks slightly confused, but not panicked or disgusted. That's good right?

"I'm less likely to be compromised, plus you're less likely to get too attached to me." Chuck sits down on his bed, silent for a change. Casey begins to worry slightly when several minutes pass and no words have been exchange. The geek is rarely quiet.

"So, what do I tell Ellie?" The geek is still not looking at him, just staring out the window. Casey hates to admit that his heart dips a little at this. Fucking eh, this is ridiculous.

"I'll ask you out tomorrow, at work so others hear it. We'll go from there." Chuck just nods and the agent chooses this moment to leave. When he gets back to the apartment he purposely doesn't look at the cameras, just heads to bed for a night of restless sleep.