Disclaimer: I do not own Durarara!

Ai and Shizuo have been living together for about 8 months now, and they have been together for 11 months now, soon to become a year.

It was December, which only meant one thing;

"Shizuo, aren't you excited?!" Shrina squealed, all the while flailing around his apartment, forever irritating the hot-tempered bartender.

His mood was quickly shifting from a mild, manageable irritation to full blown throw-Shinra-out-of-the-window fury. This was showing as he angrily gripped, and slowly but surely dented, his metal cup of tea he was holding. This caught the attention of his girlfriend, who was in the kitchen with Celty, chatting and helping the Dullahan to cook something.

"Shizuo, calm down honey" She said with a worried tint to her voice, her eyes moving from Celty's PDA to meet Shizuo's honey brown ones.

Meanwhile, at the same time, Celty pulled her PDA away from her friend and shoved it in Shinra's direction.

"Shinra! Calm down or else I'll let Shizuo throw you out of the window this time!" She scolded, which made her doctor boyfriend pout, but listen to her anyway, but also made him mutter something about his Celty being cruel to him.

After a moment, Shizuo's demeanour softened and he released the cup a little more, taking a sip and allowing the warm tea soothe his mood.

Aisami smiled, satisfied with the outcome, and went back to her talk with Celty and the food they were making.

"Why should I be excited?" Shizuo muttered, looking at Shinra with a bored expression. The doctor burst back to life at the question, but not as lively as before. He wanted to stay on his Celty's good side, after all.

"What?! You can't be serious?! Shizuo, it's December!" Shinra hinted, waiting for the penny to drop in his friends head.

Nothing happened, except for a slight tilt of Shizuo's head, the blonde obviously confused. Shinra gave up, giving an exasperated sigh as he explained to his friend what he meant.

"It's Christmas time soon Shizuo! It's going to be your first Christmas with Ai-chan! As well as your one year anniversary" Shinra said, getting excited about what he and Celty will get to do during the holiday spirit of Christmas.

"Oh" Shizuo simply said, taking another sip of his tea, also causing Shinra to look at his dull friend with his eyes wide and his mouth hanging open.

"What do you mean 'Oh'?! Do you mean to tell me that you have absolutely no plans for you and Ai-chan?" Shinra asked, his voice going up in octaves with each question.

So annoying... Shizuo thought, grinding his teeth slightly. But then, his annoyance turned into panic.

Plans? I'm supposed to make plans? Well, I guess Christmas is kind of a big deal when you're a couple... Damn it.

"What kind of plans are couples supposed to make at Christmas?" Shizuo muttered, mostly to himself, however he kicked himself as he realized due to Shinra's dazzling face that he had said it aloud.

"So glad you asked, Shizuo ~" Shinra shrieked, once again back to his flailing.

"Me and my darling Celty-chan are going out for a romantic date around those markets that open at Christmas in the centre of Ikebukuro! We're going to see the tree all lit up, watch carollers, hold hands, cuddle, kiss, ahh it's going to be magical!" Shizuo thought about all the things Shinra was planning with Celty, actually appreciating some of the ideas.

I mean, Shizuo wasn't a romantic, not really, but Aisami wasn't a touchy-feely kind of girl, but he was sure that she'd love to do some of those things. But then again, she tends to like the smaller romantic gestures than the big, grand kind that Shinra was used to.

"And then, when we get home... Well, me and Celty-chan are going to have a little bit of romantic alone time, if you know what I_" Just as he was about to finish his dirty little rant, he was stopped via frying pan.

"DON'T GO TELLING PEOPLE PRIVATE STUFF LIKE THAT, YOU IDIOT!" Read the PDA of the furious Dullahan, who's neck was exploding in bursts of shadows, indicating blushing. A whole lot of blushing...

Ai chuckled awkwardly with a little blush on her cheeks as she caught onto what they were talking about.

Shizuo's face was also painted with a slight blush, but he had it under control before Ai noticed.

I forgot about that bit... Shizuo thought with a long sigh.

It's not like they've never had sex before, I mean they've lived together and slept in the same bed for 8 months now. Of course something had happened. However, it's only happened a handful of times. Shizuo purposely limits it because of his insecurities about hurting her.

The first time it happened, it was her first which just made him even more careful than he was going to be. He didn't want to hurt her and ruin her first time for her, he wanted her to enjoy it. She did, of course, but then second time they did it, he lost it a bit in the heat of the lust and he found some light bruises on her waist and wrists the morning after whilst she was sleeping.

They weren't horrendous, they cleared up in a few days, and she constantly reassured him that they didn't bother her and that they weren't even sore, but it was all for nothing. Shizuo went through depression after it, and he didn't touch her again for weeks.

She was terrified he was going to break up with her, so she confided in Celty, who had become her best friend after their first meeting when her and Shizuo first got together, and Celty had knocked some sense into the bartender. Quite literally.

He returned to her a mess, crying and sobbing about hurting her. It was the first time he'd opened up to her fully about his feelings about the way he is, his strength. They talked all night, and fell asleep in each other's arms, both of them feeling stronger than ever together.

It helped Shizuo to realize that she isn't going anywhere, not because of a few bruises. It gave Shizuo a bit more confidence, and not long after their third time had happened. Since then, they had done it three more times, but they hadn't slept together in a month now.

Shizuo liked feeling connected to her in that way, and wanted it to happen more often, but he didn't know if it was the best idea, for her safety.

He looked at his annoying friend, Shinra, trying to decide whether or not to confide in him about this problem... After contemplating it for a few more seconds, he decided against it, but stayed behind after their visit to talk to Celty. The better, and less annoying, half of Shinra Kishitani.

"See you at home, Shizuo!" Ai said, giving him a swift kiss on the cheek before moving to hug Celty and Shinra goodbye. He smiled, lifting his hand in a lazy wave as she went through the door.

"Have fun at work" He said, chuckling at the distressed look she gave to him in return. Ai loved her job, she really did, but her boss was overbearing sometimes... You could only take so much of Simon's energy in one shift.

"Alright, I gotta head out too. Some guy needs a bullet removed from his shin. What a painful place to get shot, but at least it wasn't the knee" Shinra rambled, kissing Celty on the hand before he left, and waving to Shizuo.

After everyone else was gone, the Dullahan practically dragged Shizuo over to their sofa, pushed him down and plopped beside him, tapping furiously on her PDA.

"What's the problem? Is there something wrong with Ai-chan?" She asked, almost making Shizuo smile at how well she knew the two of them.

"It's nothing serious... We're not in a fight or anything" He clarified for the obviously distressed woman, who visually slumped back slightly on the couch, indicating a sigh of relief. Once again, she began tapping.

"So, what's the problem exactly?"

Shizuo sighed, scratching the back of his neck as he blushed, awkwardly looking around the room. It was times like these that Shizuo was glad that Celty didn't have a head. It made these kinds of things much less awkward.

"It's... It's about private stuff... You know what I mean?" He stuttered, making a sudden burst of smoke appear from Celty's neck.

At least I'm not the only one who's embarrassed then... He thought, slightly relieved.

"Go on" She said, the PDA in his face snapping him out of his thoughts.

"Has she told you anything about it?" He asked, hoping that he didn't have to go through the whole story.

Celty tapped on her PDA expertly.

"Yeah, she's told me some things... I mean, it's not like she goes ahead and tells me every little detail about your guys' private relationship, but she's told me that you guys don't... Um, you don't do it a lot... Is it because you're scared of hurting her?" The PDA read, making Shizuo sigh a little bit.

"Yeah" He muttered, running a hand through his hair wearily. Things were quiet for a while, until he heard the tapping.

"Shizuo, you know that she doesn't care about that. She wants to be with you in every way she possibly can, and she knows what that means" It read, which he nodded, still not totally convinced.

"I've been thinking that more recently... I know that she loves me and trusts me and all that, but that's not the point. Remember how I was when I gave her those bruises? Imagine how bad I'd feel if I accidentally give her a cracked rib, or a broken arm... It's just... It's harder to control myself when we're like that together" He said, sighing and looking at his feet, his eyes closing in irritation of the thought of hurting Ai.

Celty tapped furiously on her PDA and lifted Shizuo's head to shove it in his face.

"Didn't you consider one thing?" It read, which both confused and intrigued Shizuo, he shook his head no and she seemed to squirm in her place quite uncomfortably.

"Maybe she likes your strength... In that way..." This made more shadows burst through the headless woman's neck, and Shizuo just looked at the crude message wide eyed, his mouth gaping slightly.

Moments passed by in silence, and his thoughts were racing.

She likes it when I hurt her? Because of that? What the hell does that mean?!

"She's told me in the past that... Um, the bruises kind of... Turn her on" This made Shizuo literally turn into a tomato.

He wanted to flop his face into a cushion to cool his face off, but he was stuck still.

"Listen, think of it this way, the way she see's the pain during that is a lot different to what your thinking... Every now and then, she likes it. So, it shouldn't bother you if it doesn't bother her" Celty wrote, her serious demeanour returning after the embarrassing revelations of their conversation. She could only imagine Ai-chan trying to tell Shizuo any of this... The poor girl would have collapsed due to over-heating.

Forgive me, Ai-chan! Celty thought, although she's sure that her best friend will be thanking her in the long run.

"Thanks, Celty" Shizuo said, once he'd regained his composure.

"Anytime" She replied.

Needless to say, Shizuo came away from the Kishitani residence with some very different thoughts about his and his girlfriend's physical relationship. It almost made him feel smug, that he could affect her like that... But, most of all he's happy that something he hates about himself makes her feel happy and loved.

As the day went by, Shizuo went to do a few jobs with Tom, and then went to pick up Ai from her job at Russia Sushi, where she was handing out flyers with her boss, Simon.

"Ah! Shizuo, you come to eat sushi?! Sushi good" Simon said, his trademark smile spreading across his friendly face.

"Not today, Simon. Ai, you ready to go?" He said, lifting a lazy hand in a sloppy greeting to Simon.

Ai greeted him with a smile, before bowing to Simon and waving them goodbye. The couple walked hand-in-hand back to their apartment, where Shizuo surprised his shy girlfriend with a night of passion and bruises.

I'm gonna have to thank Celty-chan...

Authors note: I got a bit lazy at the end to be honest, I didn't wanna go into lots of detail so I'm sorry if it wasn't that great... I'm gonna be adding to this series, as I love the idea of writing about Shizuo's life with a girlfriend! Next one will probably lead onto their Christmas together! Hope you've enjoyed it!

If you have any ideas of a One-shot you wanna see, like a scenario you want to see them in, please tell me and I'll work on it! ^_^