AN: I haven't updated in ages but I have some spare time now so expected more Another MorMor but I just love writing this couple so much, they're my favourite. I'm not even sorry. This is not a songfic but is based on the song I'm not your boyfriend baby by 30h!3 and in the POV of Sebastian.

I sincerely hope you like it.

AA

Corp. Sebastian Moran had never had a girlfriend, or a boyfriend for that matter. Sure the occasional fuck to keep him satisfied but never something for more than 48 hours. Not even in high school. Girls would fall over themselves to twirl their hair at him and flutter their eyelashes and he'd even catch some of the boys staring for a while too long. He'd just smirk and lean back into his chair amidst his gang, who also sat looking unattainable. The only difference was that Sebastian was unattainable.

This was how he'd lived his whole life , alone. Contendedly alone; that's why he had chosen his profession. No one ever bothered him. That was until Jim. Who had offered him a ridiculously overpaid job that he took so he could continue, unmolested. However, Mr. Moriarty didn't seem to have got that memo. He texted Sebastian on the job with things like: "nice arse, I can see it from here. Xxxx" Or: "aren't you cold? It's practically snowing!xxxx"

Sebastian would always just read them, tsk, and carry on with honing in on the target. It didn't bother him too much, just left him slightly irritated. Until James Moriarty started arriving unannounced at his flat and commented on the decor, his choice of coffee, the bed sheets, anything really. He just meandered round and passed judgment on Sebastian's life casually, as if this happened all the time. At first he was pissed at this invasion of his home and shouted at Jim to get out, surprisingly, the first time he obliged. But insisting on his exit seemed to redouble the efforts James Moriarty took to annoy Sebastian Moran. He'd find post it's with notes like "Don't wear these. Ever. I'll buy you a new suit." in his wardrobe and the next day a band new John Hart suit would appear and his favourite ripped jeans would be gone. He dug his phone out of his pocket and texted his boss
"what the hell are you doing? Those are my favourite jeans! You think I can work in a fancy suit?"

"I'm improving you Sebastian, I expect you to learn."

Seb sighed, with a boss like Jim Moriarty he supposed he'd better get used to it, after all the man did hire the best sniper on the northern hemisphere.
The visits gradually became routine and instead of ignoring Jim, Sebastian would make him a share of whatever Seb decided to eat that night, Jim leaving afterwards and off handedly thanking him. Seb had a sneaking suspicion the man wouldn't feed himself if left to his own devices.
Then one night Jim stayed after dinner and through to Seb's film time. He had a collection of films spanning the size of the wall and took great pride in them. Tonight was James Bond: Diamonds are forever. Halfway through, Jim had curled into Sebastian's side and closed his eyes. He looked so vulnerable in that moment that Seb couldn't resist putting his arm around Jim. If only to protect him. They stayed like that until the film was over. Jim awoke whilst Sebastian was dozing and lightly nudged his neck with his nose. When Seb ignored him he climbed over Seb's body so he was straddling the man and bit his shoulder "Seb, wake up!" Sebastian still shifted away from the annoyance and groaned, "fuck off m'tryna sleep"
"Well you can't I'm boreed, you're being boooorriing" Seb's eyes snapped open and came to rest on the light figure of Jim sitting across his lap. When their eyes finally met, Jim leant forward and caught Sebastian's lips in a kiss to which Sebastian returned by pulling Jim down onto the sofa and planting his hands firmly on Jim's tight arse. "Shall we move this to the bedroom?" James asked seductively, and who was Sebastian to refuse? It wasn't like he hadn't noticed his boss' finely cut suits and what good shape he was in underneath them. Plus it had been a while he thought as he let Jim pull him into the small bedroom.

In the morning Seb was surprised to see that Jim was still there with his arm flung across his chest, claiming him. As Seb moved slowly out of bed and stepped into the shower he wondered why. His surprise was doubled when he re entered the bedroom to find Jim sitting up in bed with the sheets pooled around his waist, casually flicking through Seb's copy of 'Ana Karenina'
"Hey, didn't know you liked Tolstoy"
"Yeah, well sitting on cold rooftops needs a distraction"
"Heh, you have a day off today right?"
"Yeah" Sebastian wondered why his boss was even asking, he set the jobs.

And was he blushing?
"Want to go for dinner tonight then?"
Oh what the hell, his rule was 48 hours and so far it had only been 12. "Okay" Jim suddenly perked up and sprang out of bed to make coffee. "Good, wear that John Hart I bought you. I'll pick you up at 7" he rushed. "Who knew it'd be that easy to get a boyfriend?" Sebastian heard waning signals. Commitment, boyfriend, love. These were dangerous distractions. He quickly strode over to Jim, grabbed his jaw and pulled him into an intense kiss. Pulling away, he looked at Jim: heart rate elevated, pupils dilated, kiss bruised lips, flushed cheeks and slightly breathless. He leaned in close to Jim's ear and whispered "I'm not your boyfriend, baby."