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spncrscasey · 2 months

Text

Mine (m.c.)

Fandom/Characters: Chicago Fire - Matt Casey x Fem!Reader, Sylvie Brett, Stella Kidd, Kelly Severide, Blake Gallo, Wallace Boden, Christopher Herrmann, Joe Cruz, Darren Ritter

Word Count: 3.5k

Summary: You and Matt Casey had been secretly dating for a while, and it had gone smoothly since you worked at different firehouses. However, you were offered a job at 51 which despite seeming like a great idea, only made everything complicated.

Warnings: hurt/comfort, a bit of angst, a bunch of fluff, pet names, mention of anxiety, protective matt, kissing, happy ending

a/n: my first fic!!!!! (on tumblr that is lol) i used to write a lot on another platforms but haven't written for fun in forever (other than for school, ew lol.) so i might be a bit rusty so just yk excuse that until i get back into my flow :) anyways i hope you guys like it <3

For the last three years, you've been working as a paramedic at Firehouse 20 alongside Violet Mikami. During that time, you've come to know Blake Gallo as a result of his on-and-off relationship with her. Although he's a great guy, what made him even greater is the person he introduced you to about a year ago— your boyfriend, Captain Matthew Casey of Firehouse 51.

Where could you possibly start? His mesmerizing, smile and his charming personality drew you in in an instant. You never realized how the occasional encounters, transformed into intimate late-night conversations. And before you knew it, those late-night talks grew into romantic dinners and memorable dates.

After months of both of you dancing around one another, he finally masked up the courage to ask you to be his girlfriend. Without a moment's hesitation, you instantly said yes.

Six months have passed since then. Both of you had mutually decided to keep it private for some time in order to prevent any interference with your jobs. The only individuals who had known were your respective Chiefs, just in case something happened.

Your Chief also knew you could handle a busier station such as 51. So, he had just offered you the vacant paramedic position that was left after Foster left for Med School.

Initially, you were excited about the offer because it meant working with your boyfriend. However, now you're uncertain about accepting it as you're not sure how he’d react. While you believe he'd be as thrilled as you are, there's this nagging feeling that it would complicate things.

So you decided to call him.

"Hey Matt," You said once he picked up.

"Hi babe, everything okay? You rarely call me during shift." He replied, voice laced with concern.

"Yeah, yeah, everything's fine." You assure him before nervously adding, "It's just... I have something to run by you...”

"Go ahead sweetheart, what's up?"

"You know how Foster left and ever since then there's been an open paramedic spot at 51 for a while now?"

He hums encouraging you to continue.

"Well, my Chief spoke to Boden and they both agreed that I could fill that spot if I wanted to."

"That's fantastic news!" He said excitedly. "Do you want to?"

You sighed. "I do want to. I think it would be nice to work with you and the experience of working at a busier station? That would benefit me, by a lot. I’d be able to learn so much."

"Then what's there to run by me? This is your decision Y/N." Matt questioned.

"It's your house! I don't want to interfere with the little family you all have built and make things complicated considering we'd be working together while dating and what if they take it the wrong way thinking I only got the spot because I'm with you-"

"Hey! Y/N, sweetheart, breathe." He says cutting off your rambling, trying to calm you down.

"What?" you ask, voice exasperated.

"Baby, no one's going to think anything like that. You're an amazing paramedic and you earned your spot because you're good at your job. Also, no one knows that we're together so they won't suspect a thing. We don't even have to tell them yet if you don't want to.” He said reassuringly before continuing, “And you wouldn't be interfering with anything, I can assure you that we'd all love to have you at 51. This is completely your choice though, so whether you want to transfer over here or not, you have my full support, regardless of what you decide."

You smile at Matt's words. "Thank you." You pause for a moment before resuming happily, "Okay I'm going to go tell Chief that I'm accepting the position! I'll talk to you later Matt."

"That's my girl." He says smiling before hanging up.

You swiftly head to your Chief's office and let him know that you completed the transfer paperwork and are ready to begin at 51 as soon as possible. He nods, smiling, and assures you that he will push the request forward.

It was now Monday. Which also happened to be the same day you started your first shift as the new paramedic of Firehouse 51.

God were you nervous.

You had spoken to Matt multiple times and he continuously reassured you that you had no reason to feel anxious because everyone would adore you. So why were you still panicking?

Matt liked you, Gallo liked you, and so did Boden after the short interview you two had.

You had also heard a lot about each of them through Matt, and they all sounded like wonderful people. So the odds of your new coworkers welcoming you with open arms were pretty high.

Yet despite your best efforts, you couldn't shake the feeling of anxiety that was coursing through your veins, leaving you a nervous wreck.

You let out a sigh, trying to calm your nerves as you approached the Firehouse. You bumped into Gallo on the way which instantly relieved your worries. Seeing a familiar face put your mind at ease, melting your fears away, even if it’s only for a moment.

The two of you engaged in an easy conversation as you walked into the building together.

Upon entering, you spotted a table near the rigs with several individuals seated around it. Gallo eagerly ushered you towards them, quickly introducing everyone.

"Squad, this is Y/N Y/L/N, our new paramedic!" He said as you smiled, waving at them.

Gallo then pointed at a tan, blue-eyed man who was sitting at the head of the table. "That's Lieutenant Kelly Severide. Head of Squad and those are his Squad members."

He quickly got up and shook your hand. "Nice to meet you Y/L/N."

You recognized him now. He was Matt's best friend, they'd been through thick and thin together. It was sweet actually, finally getting to put a face to the name you've been hearing so much about.

Gallo took his time introducing you to the other members of Squad, all of whom greeted you with kindness and respect.

As he slipped into conversation with them, you took the opportunity to excuse yourself and find your partner, Sylvie Brett, who you’d be spending most of your time with.

She stood out easily, being one of only two women in the house. You spotted her in the kitchen, chatting with another girl who you figured must be Stella, Severide's girlfriend. Matt had spoken to you about how amazing they were as a couple, and it always made you happy to hear about them. With a deep breath, you made your way over to them.

"Hi!" You smiled. "I'm the new paramedic here working with... Sylvie Brett?" You ask unsurly, turning your head to glance at the blonde hoping you're right.

"Yes, that's me! Hi!" She answered enthusiastically, hugging you. Matt had mentioned how sweet she was but the embrace still caught you by surprise. Regardless, you hugged her back, accepting the kind gesture. Once you pulled away you waved at the other woman who smiled back at you, introducing herself as Stella Kidd.

After conversing with them for some time and getting to know one another, you headed off to the officer quarters with the hope of seeing your boyfriend.

Once you approached the office that was referred to Matt Casey, you knocked.

"Come in." You heard so you stepped inside, closing the door behind you.

"Hi baby," You said, smiling at him. He looked up from his desk, features softening as he noticed you.

"How's my favorite girl doing?" He asked standing up to give you a brief kiss on the cheek.

"I'm great! Everyone here is so nice and fun to talk to. They've all been so welcoming." You answered excitedly.

"See, I told you everyone would love you. What's there not to?" He asked rhetorically, making you smile as he placed his hands on your waist pulling you in closer. Matt's inability to keep his hands to himself never fails to make you laugh. It was all quickly forgotten though when he drew you in for a more passionate kiss when he noticed that there weren't any prying eyes on you.

As time passed, days turned into weeks, and before you knew it, you had seamlessly become a part of them. Each member of the group welcomed you with open arms, and it felt like you had found your place within the close-knit family they had formed at 51. It seemed like you had found a lasting bond and a sense of belonging with everyone there, envisioning a permanent future among them.

You became good friends with Sylvie and Stella, established a nice mentorship with Hermann, and created a sibling-like bond with Severide.

Most importantly though, to your knowledge, no one had suspected your relationship with Matt.

You wanted to say something, you really did. You didn't want him to think you were ashamed of being with him. But you didn't want the people you had grown so close to to think that you were only offered the position because of your relationship with him; even if you were confident that they weren't the type of people to believe that.

It was an ordinary day. You and Sylvie had just returned from responding to a call— nothing too serious, just tending to a man who had been cut by a broken mirror. Together with Sylvie, you bandaged him up and sent him to Med for stitches, wishing him a speedy recovery.

You were restocking the ambulance when Sylvie spoke up, "So, did you see the way that guy looked at you?"

You almost choked on your spit at her statement, not expecting it. "How did he look at me?"

"Oh c'mon- there were literally hearts in his eyes every time you spoke up while bandaging him!" She exclaimed a bit too loudly making you shush her.

"Who had hearts in his eyes?" Matt chimed in as he walked up to you and Brett, joining your conversation.

"No one," You say brushing him off but Sylvie interjects. "This guy we were helping earlier, he totally had the hots for our new paramedic over here." She said, nudging you with her arm in a teasing manner.

"Oh, did he?" Matt asked in a tone that sounded like he was joking but you could see the way his body tensed.

"It's whatever, nothing serious. It's not like I'm going to go on a date with him." You roll your eyes trying to dismiss the situation.

"You should!" Sylvie replies happily, "You're pretty and single. He wasn't bad on the eyes either, if you know what I mean. Go have some fun girl! Who knows, he could be the love of your life." She adds, winking.

Matt gave a half-hearted smile and walked away without acknowledging Brett, leaving her looking up in confusion. "What was that about?" She asked.

"No idea," You say shortly, despite knowing exactly what was going on.

Matthew Casey was jealous.

It was quite surprising because he had never shown signs of being the jealous type. In the past, if another man approached you in his presence, he would politely ask them to leave you alone, making it clear that you were already taken. Or he’d simply put his arm around you in a protective, not-so-friendly manner, letting everyone know that you were his. It never bothered you. You found it cute, actually.

But this? This was different. He had never acted this way, which concerned you.

After you were done restocking the ambo you made your way to his office, hoping to ease the tension.

You sighed as you knocked, hearing a quick come-in before stepping inside. You noticed he had his head buried in paperwork, not even acknowledging you as you came in.

"Matt, honey, what's wrong?" You asked, worried when he still didn't look up at you. You waited for a moment before continuing once he didn't reply, "Baby talk to me."

He sighs before finally looking into your eyes. His ocean blues never failed to make you weak in the knees. So intimidating but beautiful nevertheless.

"I don't want to keep this a secret any longer." He eventually replied, motioning between the two of you.

"I don't want to either but you know we can't."

"Why can't we?" He said, tone a bit sharp, causing you to flinch for a second.

"Because-" you were cut off by a knock on Matt's door making you straighten up.

"Sorry to interrupt, but there's someone here to see you Y/N." Said Severide as he poked his head into Casey's office letting you know before heading out.

You quickly glance at Matt sighing before leaving his office, silently apologizing. You hated leaving mid conversation but this could be important. You noticed him trailing behind you as you walked out but chose not to comment on it.

Once you were outside, you recognized him as the man you had sent to Med earlier. The same man who had 'the hots' for you apparently, according to Brett.

This was going to be a long conversation.

"Hello!" He said, way too ecstatic for someone who had just been discharged from a hospital.

"Hi there, how are you feeling?" You asked, keeping the conversation polite.

"Better thanks to you, you saved my life."

"Oh, you know, no big deal! Just doing my job."

"Well, I was hoping to take you out on a date as a way of saying thank you." He said with confidence, catching you off guard.

"I'm very flattered sir but you don't need to thank me, let alone take me out on a date. I'm happy to help, love what I do." You say, hoping that gets rid of him.

By now, you were fully aware that most of the members of the firehouse were watching the interaction occur from behind you. Hence why you were aiming to wrap it up as soon as possible.

"No, no, I insist. We'll have a great time together!" He pushes.

"Like I said, thanks for the offer but I'm going to have to decline. Feel better." You say, turning around.

Before you had a chance to walk away, he grabbed your wrist harshly. Pulling you backward, making you lose your balance, and almost causing you to fall.

"Woah woah woah-" "Back off!" You hear the men hurriedly interject pushing him away from you before Matt yells, in a tone that sends shivers down your spine. "Get your hands off of my paramedic before I call the authorities. You have no right to touch her, especially after she said no."

Boden hears the commotion and steps out of his office. "What's going on over here?"

"This man put his hands on Y/N after she rejected him Chief. He was just leaving though weren't, you?" Matt replies, glaring at the man making him quickly walk away.

The second that he was out of sight, everyone turned to you. Stella speaks up, "Are you okay?"

"Don't worry guys, I'm fine." You say looking around at all of them, reassuring them that you're okay. "Thanks for the help. I'm sure he won't be coming back any time soon, especially after the way Casey glared at him." You add chuckling, trying to lighten the tense atmosphere around you.

"You'd almost think you guys were dating with the way he attacked him to defend you," Severide commented casually, using a tone that sounded like he knew something. Which you decided to ignore for the time being.

At the mention of your boyfriend though, you looked up hoping to catch a glimpse of him but noticed he was nowhere to be found which alarmed you.

As the crowd dispersed and engaged in their own conversations, you discreetly slipped away and made your way to visit Matt in his quarters, marking this as your second visit there in the last half hour.

This time though, you didn't even bother knocking and simply walked in.

When he noticed it was you, he quickly stood up concerned, “Are you okay? Did he hurt you?”

“Oh, I'm alright. Don't worry, it was nothing I hadn't dealt with before in this line of duty, you know how men can be sometimes.” You answered, nonchalantly.

You both stayed quiet for a moment, not knowing what to say. Finally, you decided to break the silence, “I'm sorry, Matt. I don't want to argue with you, so if it'll make you happy, we can go tell them right now.”

He sighed, turning around in his chair to look at you, “Y/N, this isn't just up to me, we’re in this relationship together. We have to make decisions like these as a team. I love you and I want everyone to know that but if you're not taking this seriously and want to go on that date instead then-”

“No! This is serious to me Matt, I love you and you know that.” You cut him off before he's able to finish the sentence. “I have eyes for you and only you, no one else matters to me but you, Matthew Casey.” You add firmly, making sure he understands that.

“Then what’s the issue here?” He asks, tired of the constant back and forth you've been having today.

You sigh and sit down on the edge of his bed before replying, “I just- I've become so close to everyone here in the last few weeks and I don't want their opinion of me to change after they find out that you and I are together. I don't want them to think that I'm only here because of you.”

“Baby…” He says in a softer tone, getting out of his seat to come sit next to you.

You don't look at him once he's sat beside you, opting to look at the floor instead.

“Hey, look at me.” He gently says taking your hands in his, grabbing your attention.

You hum as you bring your eyes up to meet his.

When he's sure you're not going to look away, he starts speaking, “Listen to me, everyone here? They're the most amazing and supportive group of people you'll ever meet. They won't dare say anything of the sort because they'd be beyond happy for us. And if they slightly even think about it, I won't hesitate to go all ‘Captain’ on them.” He says, making you chuckle.

“Besides, I don't want idiots like that guy who can't take no for an answer, hurting you again for a nonexistent chance of taking you out.” He adds.

You lean forward, pressing your forehead against his, and after a moment passes, you mutter a simple, “Okay.”

“Okay?” Matt questions.

“Yeah, okay, let’s tell them.” You reply, nodding enthusiastically.

“I want everyone to know that this handsome man right here,” You say pointing at his chest with a teasing tone, “Is of the market and mine only.”

“Yeah?” He grins.

“Mhm,” You say with an even bigger smile, before leaning in to press your lips against his.

As your lips finally touch, a wave of stillness washes over you. It feels as though the entire world has come to a halt and all that exists is the shared connection between the two of you. At that moment, nothing else matters except for the feeling of his lips against yours.

His delicate hand caresses your face, making you smile into the kiss as you pull him in closer, wrapping your arms around his neck. There's no need to hide your love for each other anymore, allowing your affection for one another to be expressed freely without the fear of secrecy. The rush of emotion flowing through you is intoxicating and God, it is an exhilarating feeling, one that you had never felt before.

Before the kiss could progress any further, you heard cheering outside making you pull away. You glance out the window to understand what the fuss is about when you notice that the blinds were left open, meaning that all of 51 just saw you kissing Matt.

Your cheeks flush with warmth, causing you to bury your face in Matt's shoulder as he laughs at your reaction. He wraps his arm around you, pulling you closer in a tight embrace.

You look up at him, mouthing an ‘I love you,’

He whispers back, “I love you too.”

He quickly leans in for one more peck against your lips, before bracing himself for all the questions you're about to receive once you head outside.

“You guys were betting on us?” You asked amused, raising your eyebrows at the exchange of money happening right in front of your eyes.

“Well, what were we supposed to do!?” Cruz exclaimed defensively, earning a giggle from you.

“I mean, we all knew you guys were head over heels for each other, that was obvious. We just didn't realize you had been together prior to all of this.” Added Ritter, shrugging.

“I can speak for everyone though when I say that we are all very happy for you two.” Said Herrmann, making everyone nod in agreement.

As soon as the initial stage of shock died down, Stella and Sylvie rushed over to you, enveloping you in a group hug, requesting all the juicy details. While Kelly simply gave Matt a supportive pat on the back, smiling at his best friend.

Soon, the questions regarding your relationship began pouring in. Matt drew you closer, wrapping his arm around your waist as he answered each of them one by one. You rested your head on his shoulder, closing your eyes briefly, basking in the serenity.

And at last, you found yourself finally feeling at ease. Your family knew, and they were happy for you. Which is all you could ask for.

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