I just wanted to say a quick thank you to everyone who has favourited and followed. It really means a lot to me, so thank you! Also, I wanted to say thank you to BaC2323 for the lovely review! I am in total agreement with you. Chicago Fire could have definitely benefited from some more friendship scenes between Casey and Severide. But I'm glad you're liking the story so far :) Now, on to the chapter! (Also vomit warning for this chapter, but most likely for later parts of the story too, so I'll just say it's a general vomit warning lmao)

Their peaceful truce had lasted a whole thirty minutes before Casey threw up again, this time all over the bed. He had been sleeping peacefully when all of a sudden he had shot upright, barely vertical before he was vomiting all over the bedspread. Thankfully, there wasn't much in his stomach so it hadn't been hard for Severide to clean.

Severide had assured him it was okay, gotten him to take some stronger painkillers, and settled him back into the bed.

After that things had been quiet. Severide had elected to stay up and keep watch, not able to sleep while he was worried about his sick boyfriend anyway. Something about the whole situation just did not sit right with him. There was something else going on with Casey and he needed to find out before things took a turn for the worst.

Glancing at the clock, Severide checked the time. Six-thirty. Three hours after this whole mess had started. Casey seemed to finally be getting some well-deserved sleep as well, so Severide figured he'd get up and start his day to leave the man to rest.

An hour later, Severide had cleaned the apartment, made himself some breakfast, and had taken a quick shower. With nothing left to do, he decided he better call Chief Boden and let him know they wouldn't be on shift tomorrow. Even if Casey was feeling better after he woke up, Severide was not about to let him go running into burning buildings so soon after everything that had happened. Casey's body needed rest and Severide was going to make sure that it got it.

Grabbing his phone off the counter, he dialed Boden's number, figuring the man would be awake at seven-thirty.

The line only rang twice before Boden picked up.

"Severide. What can I do for you this early in the morning?"

"Hey Chief, sorry for the early wake-up call."

He heard Boden chuckle over the line, his son's excited voice talking in the background.

"Don't worry about that. I've been up since six with Terrence. That boy does not know how to sleep in."

Severide chuckled, feeling a sense of familiarity as he glanced over at his bedroom door where his sleeping boyfriend was resting.

"Glad I didn't wake you. I just wanted to let you know that neither I or Casey is going to be able to make it to shift tomorrow. I'm not sure what's going on, but Casey was throwing up all night and I don't want to infect the whole house. I figured I should let you know now so you're not scrambling to find two floaters tomorrow."

There was a slight pause where Severide could hear Boden shuffling the phone before he replied, a hint of concern mixed with his words. "Thanks for the heads up Severide. Do you think it's just the flu?"

"I'm not sure. He was complaining of a headache before he went to bed and after he threw up the first time he said it had turned into a migraine. So far it doesn't seem like anything more, but I want to watch over him just in case."

If he wasn't mistaken, Severide could have sworn he heard Boden smile over the phone. "Alright. Well, let me know if anything changes. Take care of him, Severide."

"I will. Thanks, Chief."

He set down the phone, trying to figure out Boden's weird reaction to him saying he would take care of Casey when his thoughts were abruptly cut off by a loud thump. Before he even had time to move, Casey had shot out of the bedroom and into the bathroom where Severide could immediately hear the sound of vomiting.

Rushing over to the bathroom, Severide once again found himself kneeling next to Casey as he vomited. Taking his place beside him, Severide rubbed his back as he rode out Casey's latest vomiting session with him. He winced as Casey violently heaved, but quickly found himself having to grab him before he went headfirst into the toilet.

"Whoa! Case, take it easy. Don't go passing out on me again."

Casey dry heaved one more time before his body relaxed. "M'okay."

"Yeah, sure you are," Severide replied dryly, before guiding Casey to sit on the ground.

He almost did a double-take at how bad his boyfriend looked. His face had taken on a grey hue, starkly contrasted by the deep bags under his eyes. His hair was plastered to his forehead with sweat, but Severide knew that it must have been from his latest vomiting session as he still wasn't running warm. All in all, he looked like death and that scared the crap out of Severide.

"Matt, I'm not joking this time. I am taking you to the hospital whether you like it or not. Something is going on with you and it's more than just a headache."

Casey frowned, looking like he was about to protest, but then he said something that sent a chill down Severide's spine.

"Okay, let's go."

Severide had never been as lost for words as he had now. Casey never agreed when it came to going to the hospital. Every time they had gone he had always complained the whole way. The fact that he had given in so easily caused Severide's heart to pound. Something was wrong.

Severide realized that he was just standing there, staring at Casey. He pushed all of his fear down and kicked himself into gear, allowing his first responder instincts to take over once more.

"Okay. Uh, give me one second. I need to grab my phone, keys, and wallet. I will be right back."

Sprinting out of the bathroom door, Severide practically lunged at his coffee table where he grabbed everything he needed. Picking his jacket up off of a chair nearby, he shoved it on before placing everything he needed in his pockets. He had done this in record time, only leaving Casey alone in the bathroom for a minute, but that was all it took.

Racing back into the bathroom, Severide swore his heart stopped as he took in the scene before him. Casey was now jerking all over the floor, his limbs flailing sporadically as his head thumped against the tile floor.

"Matt!" he yelled, quickly sliding next to him, bracing the blonde's head so he wouldn't hurt himself even further.

Without thinking, he whipped out his phone and dialed 911, his attention never leaving Casey's pale face.

"911 what's your emergency?"

"My name is Kelly Severide, I'm a lieutenant with the CFD. I need an ambulance sent to 3520 N Lake Shore Drive, apartment number 3. My boyfriend's having a seizure!"

To be continued...