It was the 23rd October, the night before Thrax's birthday, and Ozzy was a nervous wreck. He was sitting in bed biting all the skin off his fingers, mumbling to himself, unable to shut his brain off.

He had always been a sucker for birthdays, and desperately wanted to give Thrax a day to remember. He'd spent the last few days making and buying presents for him, and thinking of ways to try and make his birthday as special as possible.

Thrax woke up at 2am to the sound of Ozzy murmuring.

"Baby, please try and get some sleep", he croaked, pulling Ozzy into his arms.

He finally started to drift off as Thrax stroked his head and softly hummed in his ear.

Beforehand, he had set an alarm for 5am to try and be up before Thrax and get everything ready, but when his alarm went off, he groaned and smashed his hand on top, turning it off. He rolled over, shoved his face into Thrax's chest and fell back to sleep.

A few hours later, he was woken up when Thrax put his arms around him and kissed his head. "Good morning, baby, you're looking particularly cute today."

Ozzy smiled and opened his eyes to look at him, before remembering what day it was. He pushed Thrax's arms off of him and scrambled to sit up. He snatched the alarm clock off the dresser and saw the time.

9:15am.

"Oh, shit, shit, shit! I'm such an idiot", he hissed, as he repeatedly hit himself on the forehead with his palm.

Thrax shuffled closer to him and put his hand on his back. "What's wrong?"

Ozzy hung his head and exhaled sharply. "I set my alarm super early so I could prepare everything for when you woke up, but I must have slept through it."

Thrax smiled softly and put his hands on his waist. "Don't worry, baby. Like I said, I'm not really into birthdays. Besides, I'm perfectly happy just staying in bed with you all morning." He pulled him back so that he was spooning him, and wrapped his arms and legs around him, humming into his neck.

Ozzy smiled and nestled his back into Thrax's chest. "Happy birthday, by the way. Thirty-eight years young."

"Oh, don't remind me. Soon I'll be forty and then before we know it I'll be walking with a Zimmer frame and you'll leave me for a younger man."

Ozzy elbowed him in the ribs and laughed. "You're such a drama queen."

He wiggled out of his arms and leaned over to pick up a large paper bag from under the bed. He held it out for Thrax to take, smiling sheepishly. Thrax looked at him and pointed at the bag. "Is that for me?"

"It's nothing special, they're mainly silly little gifts."

"The fact you got me anything at all is special, baby. No one's ever bought me a present before…", Thrax said quietly.

He put his hand in the bag and felt something soft. He pulled it out and ripped the wrapping paper off to reveal a black T-shirt with a picture of Ozzy's face printed on the front, and 'if lost, please return to Ozzy' written above it.

Ozzy pulled another, smaller T-shirt out of the bag that had 'I'm Ozzy' written on it.

Thrax laughed and slipped the T-shirt over his head. "This is genius, Oz, but it means that now you can't ever get away from me."

Ozzy put his on too and leaned in to kiss him on the cheek. "Go on, open another one!"

Thrax took another present out of the bag and unwrapped it as slowly as possible, grinning mischievously.

"Come onnnn", Ozzy whined.

Thrax pinched his cheek before tearing the wrapping paper off and smiling. "You've bought me a camera! I've never had one before!"

"Well that's what I thought! I bet there's not a single photo of you anywhere, so let's remedy that." He snatched the camera out of his hands and took a close up photo of him.

Thrax grabbed the camera back off him. "Give me that, I wasn't ready! How can I delete that photo?"

"You can't, it's a disposable camera, so we won't know what any of the pics look like until we get them developed."

"Oh, well, in that case…" He shoved Ozzy onto his back and straddled him, before pointing the camera at him and taking photos from different angles.

"Beautiful, baby, that's it, the camera loves you."

"Get off me, you prick! I bet I look like shit from this angle!", he yelled, trying to cover his face with his hands. "And don't use all the film, it only holds 50 photos!"

Thrax stopped taking photos and leaned down to kiss him on the lips. "Fine, but just so you know, you look amazing from up here. There's no other angle I'd rather see you from."

"Pfft...you dirty old man."

Thrax got off him and stuck his hand back in the bag to pull out an envelope. He opened it and took out a letter and a drawing of him and Ozzy. He stared at the drawing for a few seconds, before asking quietly, "did you draw this?"

Ozzy nodded enthusiastically. "Yeah, it took ages to get your face right, you're well hard to draw."

"Ozzy, this is so cute, but you're seriously telling me that the same hand drew this picture and wrote this letter? I don't get how you can even draw a straight line with your handwriting being so atrocious."

"Oh shove off."

Thrax grinned and turned back round to try and read the letter. He could tell that Ozzy had tried his hardest to make his handwriting as legible as possible, but he still had to squint to understand what he'd written.

'Thrax, today is your birthday. I have been looking forward to having the chance to celebrate you for over a month now, and I hope I can make this day as special as you are.

You're the hottest, sexiest, craziest piece of shit I've ever met, while also managing to be the sweetest, kindest, funniest, gentlest person I've ever come across. I can't even imagine how I lived before you came into my life, and I can't wait to share even more ridiculous times with you.

Thank you for being you, my love. Happy birthday'.

"Oh, Ozzy, thank you…", he said softly. He turned to give Ozzy a hug and kissed him on the shoulder. "This is already the best birthday I've ever had."

They went downstairs and Ozzy told Thrax to sit at the dining table. He made him a coffee and brought it over, a self-satisfied grin across his face and one hand behind his back.

"I got you this mug too!", he said, plonking the mug on the table and spilling some coffee over the sides.

Thrax picked it up and turned it round to see 'best boyfriend ever ' written around it. Then Ozzy brought his arm around to the front and shoved some flowers in Thrax's face. "And these! Look, they're just like us!"

Thrax grabbed the flowers from him to pull them away from his face and started laughing when he saw the mix of blue and dark red flowers clumsily tied together with a piece of coarse string.

"Where did you even get these?"

"I saw them a couple of days ago in someone's garden and they reminded me of us, so I jumped over their wall and nabbed a few."

"Right, well, now we can add vandalism and trespassing to your ever growing list of crimes. I really have corrupted you, haven't I, baby?"

"Ohhh, you're no fun! It's romantic! Anyway, hurry up and drink your coffee and then I'll take you out for lunch."

Ozzy took him to a Chinese takeaway stall and ordered everything that he remembered Thrax had said he liked. They carried it to the park and Ozzy laid down a blanket for them to sit on.

He took a spring roll out of one of the boxes with a pair of chopsticks and waved it around in the air. "Okay, open wide!"

Thrax cleared his throat and looked over his shoulder, clearly feeling a bit embarrassed. "Oz, if it's all the same to you, I'd rather you didn't feed me here in front of all these people."

Ozzy's smile was wiped from his face and he lowered his hand. "Yeah, okay, sure." He handed the chopsticks to Thrax and took out another pair, before he started shovelling noodles into his mouth and staring straight ahead.

Thrax shook his head, mentally slapping himself, and pulled Ozzy onto his lap. Why the fuck do I care what people think of me when I've got this gorgeous little cell as my boyfriend?

"Hey, baby, can you feed me one of those round things over there?"

After they'd eaten almost everything, they lay down on the blanket and stared up at the sky.

"Sorry it's all been a bit chaotic today, I had set my alarm so that everythin' would be ready for when you woke up, but…"

"Don't say sorry! All I wanted today was what I want everyday: to spend time with you."

Ozzy rolled onto his front and put his hands under his chin. "Man, you're one cheesy motherfucker, ain't ya."

Thrax smiled and shut his eyes. "Only for you, baby."

Ozzy hesitated, running his fingers over Thrax's chest, before asking, "so… you've never treated anyone else like this?"

"Nope, don't think so. Everyone else annoys me too much. I can't stand being around people for more than a few minutes, they're all such idiots, lost in their own mundane little lives, having the same insipid conversations about work or what TV shows they watched at the weekend."

"And I'm not like that?"

Thrax opened his eyes and turned his head to look at Ozzy. "No, baby. You never have been. You perceive things more deeply. You live life to the fullest. You don't take things at face value, and you never give up when you set your mind on something."

Ozzy laid his head back down on the blanket and mumbled, "I'm still not used to havin' someone say such nice things to me."

Thrax raised an eyebrow and started stroking Ozzy's arm. "Tell me something, baby, why did they give you such a hard time back in Frank?"

Ozzy closed his eyes and sighed. "I fucked up a lot on the job. Even though I'm pretty sure I did the right thing most of the time, my methods were… questionable and reckless. Also, I don't know if you've noticed, but I'm way more pliable than most white blood cells. I used to get made fun of a lot for that."

"Well, it is freaky." Thrax turned onto his side and held his head up with his hand. "It's cool, though. The fact you can change your appearance and squeeze into such tiny spaces is something you can use to your advantage. I bet they were just jealous."

"Hmm… it usually just got me into more trouble. I sure was grateful for it when you tried to impale me, though", he said, prodding Thrax in the chest.

"Yeah, sorry about that, but you'd pissed me off."

Ozzy grinned, pushed Thrax onto his back and straddled him. He made his hair longer to look like Thrax's braids and placed his fist in the middle of his abdomen. "Can you feel the heat, Jones?", he said, making his voice as deep as it would go. "Too bad you won't be here, to see me break my record, uhh, when I…? Shit, what did you say next?"

"I don't fucking remember, but I do remember when you split yourself down the middle, that was disgusting! It almost made me throw up!"

"What, like this?", he taunted, grabbing at the sides of his face.

"No, don't you fucking dare, I've just eaten!" He grabbed Ozzy's wrists and sat up, making him fall onto his lap.

Ozzy laughed and straddled Thrax's thighs, wiggling his hands around under his grip. "I could so easily get out of this, y'know."

"Yeah, but do you want to?"

Thrax leaned down and kissed him, letting go of his wrists and wrapping his arms around him to pull him in closer. Ozzy sighed into the kiss and threw his legs around his waist.

Someone walking past them scoffed and made a comment about how they needed to get a room, and Ozzy broke the kiss to tell them to fuck off, before smashing his lips against Thrax's again and making sure to moan extra loudly.

He then ran his fingers down Thrax's stomach, quickly undid his belt and slipped a hand into his trousers.

Thrax gasped and pulled away, fumbling to do his belt back up. "Ozzy! There are cells everywhere! I know you get off on public exhibitionism, but this is a whole other level of crazy!"

Ozzy smiled and folded his arms over his chest. "Oh, how the tables have turned. Since when were you so prudish? As I recall, you were more than willin' to fuck me in that park back in Frank."

"That's not the same and you know it. One, I was drunk, and two, it wasn't during the middle of the day!"

Ozzy rolled his eyes and sat back to lean on his elbows. "Yeah, yeah…" He sighed, letting his head fall back as he slowly started pushing his T-shirt up with his thumbs to expose his midriff.

"Jones, stop that."

"Stop what?", he said innocently, laying back down on the blanket below and arching his body upwards.

"You know what."

"I have no idea what you're talkin' about, man", he replied, as he shuffled his crotch closer to Thrax's and let out a small moan, before biting his bottom lip.

"You're nothing but a filthy sex pest, you seriously need to be arrested."

Ozzy sat up and rolled his eyes again. "Whatever, can we go home now?"

When they got home, Ozzy laid the blanket out in the garden and told Thrax to take his shirt off and lie down on his front.

"For once in my life, Jones, I'm not embarrassed to admit that I feel a little bit scared. What the hell do you have in mind?"

"Nothin', I was gonna give you a massage! Fuckin' hell, Thrax, you're so obsessed with sex."

Thrax laughed, took off his shirt and lay face down on the blanket. Ozzy straddled his back and took his top off too, before leaning down and pressing his front against him.

He gently trailed his fingers around his neck and then over his shoulder blades, feeling the muscles under his skin. "God, you're tense."

"Yeah, I've been especially stressed for about a month and a half now."

"What happened a mon...?", Ozzy started, before realising and jamming his elbow between Thrax's shoulder blades. "Whatchu talkin' about? I've made your life nothin' but exquisite."

"Ow, Jones, that fucking hurt! Also, I still don't think you know quite how to use that word."

Ozzy apologised and started kneading his shoulders with his thumbs. Thrax sighed contentedly as he felt his whole body start to relax under Ozzy's soft hands.

He kept working down his back, kneading small circles with his fists, and asked if there was any particular area that he wanted him to massage. There was no reply.

"Thrax?" He slowly stood up and went to kneel by Thrax's head. He carefully lifted up one of his braids to get a look at his face and saw that he had fallen asleep.

Ozzy grinned and rubbed his hands together. This had been his plan all along. He needed Thrax out of the way for a bit to be able to catch up on all the dinner preparations he hadn't done that morning.

He ran inside to grab a blanket and placed it over him. He lightly kissed him on the head, before darting back inside to start making dinner.

Thrax woke up and shivered. He pulled the blanket over his shoulder and opened his eyes to see that it had started to get dark.

"Ozzy?", he croaked as he lifted his head. His eyes were half closed and one of his braids had fallen over his face.

He looked up at the house and frowned when he saw that the kitchen light was on. He pushed himself up, put his shirt back on and staggered over to the door, lightly slapping himself on the cheeks to bring him out of his dazed state.

He pushed the door open and stepped into the house, blinking in the light. He looked into the kitchen to see Ozzy running around, chopping and dicing hurriedly and cursing under his breath. He was so engrossed in making the dinner that he hadn't noticed him come in.

Thrax raised an eyebrow when he saw that he was wearing nothing but a frilly pink apron, and he shut the front door softly. He sneaked across the floor and pressed his body against Ozzy's back, making him jump.

He pinned his hands to the counter and whispered in his ear, "you are looking absolutely delicious. You really didn't have to go to all this trouble, I'd much rather eat you."

Ozzy slipped his wrists out of Thrax's grasp and turned around to look up at him. He tutted and said in a low voice, "after all the effort I put in? No, you're gonna be a good boy and eat all your dinner. Then, if you behave, you can have some dessert."

He rubbed his hand over the front of Thrax's trousers before grabbing his wrist and leading him to the dining table, where he pushed him down to sit on a chair.

He dipped his fingers in a bowl of cream and looked Thrax in the eye as he slowly licked them clean, before spinning round and skipping back into the kitchen.

Thrax shifted in his chair and swallowed as he watched him walk away. "I've turned this innocent little cell into a dirty sex fiend", he mumbled under his breath.

As Ozzy prepared the dinner, Thrax watched him from the dining table and started blushing slightly. He felt some saliva pooling in his mouth, and didn't know if it was because of the smell of the food, or the view he had of Ozzy leaning over the counter.

Mercifully, the food was soon ready, and Ozzy dished up a plate for Thrax. He sat down opposite him and told him to enjoy his meal.

Thrax grabbed a fork, his hand shaking slightly, and asked, "aren't you gonna eat anything?"

"I've got my dinner right here", he uttered, taking a strawberry from the table and dipping it in chocolate. He sucked the chocolate off the tip while closing his eyes and moaning softly.

Thrax's eyes widened, his fork hovering over his plate as he stared at him, completely captivated by what he was doing.

Then, Ozzy took some melted vanilla ice cream on a spoon and threw his head back. He opened his mouth, stuck his tongue out and let the ice cream slowly drip into his mouth.

"For fuck's sake", Thrax hissed, blushing harder and folding one leg over the other.

Ozzy turned to look at him, feigning concern. "Don't you like your food, baby?"

Thrax felt the heat rise to his face and he started babbling, trying to form a coherent sentence. "N-no, I do, I mean, everything looks great, it's just…"

Ozzy tutted and got up from his chair. Thrax followed him with his eyes as he sauntered over and straddled his lap. He put his arms around his neck and looked him in the eyes. "Need some help there, Big Daddy?" Thrax nodded and put his hands on Ozzy's waist.

Ozzy smiled and reached round to grab the plate of food from the table. He could feel how hard Thrax was beneath him and could sense just how much he wanted to grab him, throw him on the table and fuck him silly, but he took his time feeding him, thoroughly enjoying having this power over him.

Here he was, a small white blood cell in a frilly pink apron, with a virus twice his size wrapped around his little finger.

When Thrax had eaten everything from the plate, Ozzy put it back down on the table and leaned in to whisper in his ear, "good boy, would you like your dessert now?"

Thrax gulped and nodded, tightening his grip around Ozzy's waist.

Ozzy grazed his lips over his cheek for a few moments, relishing the way Thrax was practically shaking with desire below him, before grabbing his face and kissing him deeply.

Thrax moaned softly as he felt Ozzy part his lips with his tongue. He opened his mouth and sighed into the kiss, while Ozzy raked his fingers through his braids and arched his body towards him.

Ozzy trailed his fingers around Thrax's neck and then started slowly undoing the buttons on his shirt. He ripped it open and pressed himself against him as they breathed each other in.

Sparks ignited in Thrax's chest as Ozzy reached down to undo his belt and slip a hand inside his boxers.

Ozzy ran his fingers over him and bit him on the lip, before pulling away and sliding off his lap to sit on the floor between his legs. He pulled his trousers and pants down and grabbed a pot of strawberry yoghurt that he had left on one of the chairs.

"How did I get so lucky?", Thrax said breathlessly, as he stared down at Ozzy lathering him with yoghurt.

Ozzy left the pot on the floor, before opening his mouth, sticking his tongue out and flicking his eyes up at Thrax.

The look Ozzy gave him sent shivers down his spine and a high pitched whimper escaped his lips. He clamped his hand over his mouth, surprised that he could even make that noise, and Ozzy grinned. He wanted to have Thrax screaming his name by the time he was done with him.

He licked the yoghurt off the tip, before placing his tongue at the base and dragging it up his length. Thrax growled and took his hand off his mouth to hold onto the sides of the chair as Ozzy continued slowly licking all the yoghurt off.

He pulled away to apply more, his face covered in pink, and he quickly looked up at Thrax as he licked his lips.

Thrax closed his eyes and threw his head back as Ozzy spread the yoghurt over him again.

It was taking all of his will power not to grab his head and force it down, but he gritted his teeth and let Ozzy do things his way.

He loved that Ozzy wasn't afraid to take the lead in bed. It was something he'd never experienced with a partner before, and not knowing what was going to happen excited him to no end.

Ozzy sat up on his knees and patted Thrax's thighs to get him to open his legs wider. He grabbed his hips and took him into his mouth almost all the way, watching the way his eyes rolled back and his body slowly arched towards him. He closed his eyes and opened his mouth as wide as it would go to take in the rest.

He moaned around him and moved his head up and down as Thrax whispered his name and tightened his grip on the chair.

Ozzy could feel him at the back of his throat and flattened his tongue to run it under his shaft as he moved back and forth, loving every noise that escaped Thrax's lips. It felt great to be the one in control for once, and unlike before, Ozzy had no desire to hurry things along.

As Thrax's moans quickened, Ozzy took his mouth off of him and stood up without breaking eye contact.

Thrax looked at him, his face flushed and his eyelids heavy, and went to say something, when Ozzy put his finger over his lips.

"Shh, don't worry, I'm not done with you yet."

Ozzy grabbed his wrists and led him to the bedroom, where he shoved him down to sit on the edge of the bed. He kneeled down to reach under the bed and pulled out a tub of lube.

Thrax's eyes widened. "W-what's that for…?"

Ozzy just looked up at him and raised an eyebrow. He then stood up and pushed him down to lay on the bed, before taking his apron off and spreading some lube over his cock.

Thrax gasped and sat up quickly. Ozzy saw his expression and stopped, his brow furrowed. Then his mouth fell open as he realised something.

"You've never done this before, have you?"

Thrax shook his head and looked away. Ozzy let out a small sigh and leaned down to nuzzle his face in the crook of his neck.

"Okay, we don't have to do anything you're not comfortable with, I just thought it'd be fun to try somethin' new. We'll stop here."

He moved back a bit to look at him, smiling softly to try and convey that everything was fine. "Shall I get the yoghurt again?"

Thrax looked into his eyes and felt his heart flutter. If he had ever refused to do anything he was uncomfortable with before, his partner would always just get angry at him and leave, and he probably would have done the same. Never had anyone shown him such kindness and patience.

If anyone was going to do this to him, it should be Ozzy, someone he trusted completely.

He lifted Ozzy's chin with his claw and kissed him gently. "Let's do it, baby", he purred.

He figured it couldn't be so bad, given their size difference. If Ozzy could take him, surely he'd be able to.

Ozzy opened his eyes to look at him. "You're sure?"

"Yeah, let Big Daddy Thrax have it."

Ozzy's eyes lit up. He slid his arms around Thrax's neck and pulled him into another kiss, before trailing his fingers down his back and around his waist. He pushed on his chest with one hand to get him to lie down as he knelt on the bed between his legs.

He slowly ran his fingers down his stomach and dipped the other hand in the tub of lube. He parted his lips with his tongue and wrapped his hand around his cock, and Thrax grunted as he felt Ozzy slide a finger in.

Ozzy broke the kiss and whispered against his mouth, "don't worry if it feels weird, that's normal." He dropped a few kisses on his cheeks, "but if it ever hurts, you let me know and we'll stop, alright?"

Thrax nodded, gasping as Ozzy added another finger. It didn't exactly hurt, but it definitely didn't feel 'normal'. He started to wonder if this had been a bad idea until Ozzy rubbed over a spot that made a moan slip from Thrax's lips. He tilted his hips upwards and shut his eyes, biting his lip as Ozzy continued to rub over that same spot.

Ozzy slid his fingers back and forth and tightened his grip around his cock, watching Thrax's expressions carefully. He added a third finger and spread them as he leaned forward to kiss up Thrax's neck.

Thrax couldn't help the noises that escaped his mouth; having Ozzy's hand around his cock, his body pressed up against his, feeling his fingers deep inside him and his lips on his neck, it was all Thrax could do to keep from screaming his name and begging to be fucked silly, but his pride kept him from doing so.

He grabbed onto Ozzy's hips and pushed him down, positioning him where he desperately needed him. Ozzy understood what he meant by that and pressed his lips to Thrax's again as he carefully pulled his fingers out.

He applied more lube to himself and stood on the floor between his legs. He grabbed Thrax's thighs to pull him closer and put his legs over his shoulders, looking him in the eye as he positioned himself just outside his entrance. He raised an eyebrow. "You ready?"

Thrax closed his eyes and nodded, gasping as he felt Ozzy start to ease into him. It felt strange, like a pressure between his legs, and he didn't know if he liked it or not.

Ozzy watched his face for any sign of discomfort and added more lube when necessary. He was normally incredibly impatient in bed, but he inched in slowly, wanting to make the most of having Thrax like this, and to make sure that he enjoyed himself.

He managed to get some of way in before he stopped to give Thrax a chance to get used to him.

"Is that it?!", Thrax said as he lifted his head up. He then covered his mouth with his hand, realising what he'd just insinuated.

"Nah, that's only like halfway."

Thrax's hand fell to his side and his jaw dropped. "I never knew you were so big."

Ozzy smirked. "Imagine how I felt the first time! Yours is like the size of my fuckin' arm!"

Thrax laughed and rested his head back on the pillow, waiting for him to continue.

After a few seconds, nothing happened, and he lifted his head back up. "What are you waiting for?"

"For you to tell me how much you want it", Ozzy uttered lasciviously, "I want you to beg."

Thrax blushed and bit his lip. He'd never begged for anything before. He'd always either taken control or his partner always did exactly what he wanted, yet here was Ozzy, a man that Thrax could easily snap in two, making him beg for his cock.

But for some reason, that Thrax couldn't explain, it really turned him on.

He slowly looked Ozzy up and down. His slight muscles bulging in his arms as he held his legs up; the street light dancing over his toned shoulders and lighting up his membrane; his curls falling messily over his forehead; his eyes wild with desire; one eyebrow raised; and a grin spread across his face, waiting for Thrax to start begging.

He'd never seen anything sexier in his life, and if anyone deserved to hear him beg, it was him.

He looked Ozzy straight in the eyes and grinned. "I want you to fuck me senseless, Jones, I'm all yours."

Ozzy's smile widened and he tightened his grip around Thrax's hips as he started to inch in. He moved slowly at first, pushing slightly further in with every thrust to match Thrax's breathing.

He'd almost reached the base and looked up at Thrax to see how he was handling it.

His eyes were screwed shut and his brow was furrowed, he was biting down on one of his claws and his other hand was fisting the sheets by his hips while his legs quivered around Ozzy's neck.

"You're cute", Ozzy lulled, prompting Thrax to open his eyes. Ozzy smirked at him and moved back a bit before thrusting back in, hard.

Thrax tightened his grip on the sheets and clenched his teeth. "You prick", he hissed, but quickly relaxed as Ozzy reached a steady pace.

They made eye contact then and laughed; it seemed so strange to both of them to switch roles. "How're ya doin', big boy?", Ozzy asked between heavy breaths.

Thrax didn't respond and simply gave him a thumbs-up as he let his head fall back into the pillow.

Ozzy sped up the pace and closed his eyes, dropping his head forward and moaning softly. He pushed deeper and deeper, and noticed how Thrax had started rocking his hips in time with his thrusts.

Thrax was moaning deeply, his eyes glazing over and his breathing heavy as each thrust sent a throb of pleasure through his whole body. It was so much better than he could have imagined, but he wanted to feel Ozzy closer to him.

He moved his legs so they were resting by his sides and weakly held his arms out. "Come here, Ozzy", he said breathlessly.

Ozzy stopped to climb onto the bed and lean over him. He pressed his lips to Thrax's, moaning against his mouth as he continued to grind into him. He broke away and started leaving soft, slow kisses up his neck, whispering, "God, you feel so good." He then grabbed his hands and pinned them to his sides, picking up the pace slightly. "I love you so much."

A bead of sweat dripped off his forehead and onto Thrax's chest, prompting Thrax to open his eyes and look up at him. He saw he had his usual expression: eyes screwed shut, lips parted, a blush spread across his face and his hair flopping about in front of his forehead as he moaned Thrax's name.

God, he's so fucking hot.

Ozzy then lifted Thrax's hips and brushed against a spot that made him throw his head back and moan loudly. His reaction sent a jolt through Ozzy's whole body. He tightened his grip around his hips and slowed down the pace, trying to concentrate on that one spot.

He rubbed against it over and over again, never letting up, and Thrax lost control of his body, arching his back and crying out Ozzy's name.

Thrax looked up at him and begged him to go harder and deeper.

Ozzy loved seeing Thrax be so submissive for once and still couldn't believe that he, a white blood cell, had managed to turn this deadly virus into such a pleading, writhing, panting mess.

Two of his braids were dangling over his face and the rest were strewn around his head. His cheeks were flushed and his eyes were hazy. His chest was heaving and his breathing was ragged as his moans got louder with every thrust.

"You look so fuckin' sexy", Ozzy whispered, "I wanna see you cum for me."

He took one hand off of Thrax's hips and started touching him again. Cum was already leaking out, dripping down his length and covering Ozzy's hand.

Thrax threw his head back and opened his legs as wide as he could as he felt the pressure building below his stomach.

"Oh… fuck me… Ozzy!"

His vision went blank and his body arched upwards out of his control as the heat spread through him.

He felt as though fire was coursing through his entire body, all the way up in his throat to the tips of his toes. Ozzy groaned as he felt Thrax tighten around him and start rocking his hips, countering his thrusts.

Thrax fell back onto the bed and grunted as Ozzy roughly forced his hips back up. He dug his nails into his skin and picked up the pace, screwing his eyes shut and moaning his name.

Thrax locked his legs around Ozzy's waist and pushed him further inside, grabbing his face and pressing their foreheads together. Ozzy opened his eyes and gazed into Thrax's, and the small moans that escaped his lips began to quicken as he felt himself reaching his climax. He tilted his head back slightly and shut his eyes again as waves of pleasure radiated out from his middle, up into his chest and down to the tips of his fingers.

He continued to slowly thrust into him as he rode out his climax, pressing every part of himself as close to Thrax as he could. He dropped his head and brought his lips to Thrax's again, enjoying a softer, gentler kiss.

Thrax unlocked his legs from around Ozzy and relaxed back into the bed below, grunting as Ozzy carefully pulled out.

Ozzy broke away and began trailing small kisses down Thrax's chest and stomach, stopping when he reached below his navel. He took Thrax's cock in his hand and started to lick the cum off it, softly moaning as he did.

He looked up at him and caught his eye, and Thrax whimpered again for the second time that night. Ozzy raised an eyebrow at that noise, before shutting his eyes and slowly licking him clean.

"Oh… my… God", Thrax whispered, as he let his head fall back onto the pillow. Ozzy wiped his mouth and crawled up the bed to lay his head on Thrax's chest and his leg over his stomach.

He drew slow circles over his chest with his finger, grinning like a madman.

"Who's the Big Daddy now?", he gloated.

Thrax laughed and shook his head. "Nah, I'll always be Big Daddy." He sighed contentedly and ran his claws up and down Ozzy's thigh.

"Baby, no one has ever made me feel that good, for real. You're incredible. I thought you said you'd never had sex before me?"

Ozzy snapped his head up to look at him. "What?! I never said that! That's just wishful thinkin' on your part." He nuzzled his cheek into the crook of his neck and laced their fingers together.

Thrax hummed and pulled Ozzy closer. "And just so you know, you're wearing that apron more often. That's the hottest thing I've ever seen."

Ozzy laughed. "So, what's been the best part of your birthday?"

"Do you really need to ask?"

Ozzy smirked and left a few slow kisses along his shoulder. "Sooo… why hadn't you tried that before?"

Thrax shifted a bit and Ozzy looked up at him. "You don't have to answer, I was just curious."

"No no, it's fine. I don't know, I guess I always felt like I'd be… vulnerable if I did."

"Vulnerable? You? Nah, man." He turned over onto his front and rested his chin on his hands. "I mean, sex in general is kinda vulnerable, ain't it? Like, you're both completely exposed in that moment. But when you trust each other, that vulnerability is kinda… beautiful."

Thrax smiled and stroked Ozzy's cheek. "God, sometimes you come up with the most profound shit, y'know."

"Yeah I know, I'm secretly a genius", Ozzy said as he rolled onto his back. He shut his eyes and started running his fingers over Thrax's stomach.

They were silent for a moment, before Thrax said quietly, "sorry we never did this before, Ozzy."

"Don't say sorry, I mean, I enjoy both ways." He trailed his fingers down, reaching below his navel and continuing towards his length. Thrax sighed contentedly and tilted his head back.

"Speaking of which…", Ozzy said, raising an eyebrow as he felt Thrax's cock hardening under his hand. He reached down to grab the lube again and rubbed some in his hands to heat it up.

Thrax laughed and put his hand on Ozzy's wrist. "Ozzy, sorry baby, but I won't be much use to you. You've worn me out."

Ozzy frowned and shook his hand off him to apply the lube over Thrax's length. "Who said you had to do anything?"

He slid his leg over Thrax's stomach and dug his knees into the sheets on either side of his waist, before reaching behind him and wrapping a hand around Thrax's cock.

He looked at Thrax through heavy lids and lifted himself up. "Now, sit back, relax, and enjoy the ride, baby."