Disclaimer: I don't own Invader Zim. I'm not making any money. Nuff said.

I've read a lot of ZADR fanfiction and seen like fifteen different head canons for Zim's anatomy. I feel like my head canon is kind of main stream? Idk.

By the way, when I said there would be smut, I never said it was good smut *insert at least you tried meme here*

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INTERSTELLAR SERIES PART ONE

POLARIS

Chapter Twenty

"The way you humans portray beings outside your planet is horrible and offensive," Zim complained as he and Dib sat on the couch in their dorm room. After the bombshell of their first mission approaching, the two them figured a movie night was in order. They both picked several from their downloaded collection and were taking turns back and forth choosing what to watch. They had just finished watching Alien Vs Predator, complete with Zim commentating on all the inaccuracies and how stupid the humans were.

In hindsight, Dib probably should have expected that...

"Well, sorry," Dib drawled half-heartedly, "it's not like we've had an alien on our planet to help us write our movies better." He gave him a pointed look.

Zim responded by throwing a piece of popcorn in his face. "No need to be RUDE, Dib!"

Dib threw the popcorn right back. "That was your choice, by the way. I don't know what you expected."

Zim gave a thoughtful look. "Eh. I was curious."

Dib just snorted, scrolling around the other choices on the screen. He smirked a little as he came across a horror movie. He clicked on it and watched Zim as the opening credits started. The Irken's antennae perked up. "What is this, Dib-stink?"

"It's called The Ring," Dib replied, still smirking. "Midge and I watched this a while back."

Zim frowned. He knew that Midge was bonded to Dek and had no romantic interest in Dib, but, even after all this time, he still couldn't help but feel jealous of her being near his human. He turned his attention back to the screen, watching as the scenery became dark and eerie. "Is this one of those horror movies?"

"Oh, it's not that scary," Dib said, not trying very hard to sound convincing. "Midge wasn't scared at all." Which was a huge lie. Midge had jumped and screamed at every single "frightening" moment and had even demanded that they watch something light-hearted afterward.

However, it had the desired affect. Zim's eyes narrowed challengingly, and he adjusted his posture to look more confident. Dib was certain for a moment that maybe the Irken wouldn't break, but then the main character started watching the tape.

"What…what is happening?" Zim asked. He looked horrified and disgusted at the tape's imagery.

"She's watching the tape," Dib replied casually.

"Why? She knows that tape killed those other humans."

"But she doesn't," said Dib. "She's trying to figure out how they died."

Zim's eyes narrowed. "I feel like this is something stupid you would do."

"I wouldn't watch a tape that kills people!" Dib argued defensively.

"Tch! You would to solve some silly, parachuty mystery! And then you'd end up dead!"

"It's 'paranormal.'"

"You're face is para – whatever!"

Dib rolled his eyes, continuing to watch the movie. Horror movies, even creepy ones like this, never really bothered him. After dealing with real angry spirits, it took quite a bit for him to actually get scared. Zim continued to commentate through, saying that human was stupid and that scene was awful.

That was until the scene finally came where the little girl crawled out of the ex-husband's T.V.

"AAAAHHHH! TURN IT OFF, DIB!" Zim demanded.

"What? It's not like it's real," Dib said, doing his best not to laugh. "She can't get you."

Zim suddenly tackled him, reaching for the remote. "TURN IT OFF YOU STUPID HUMAN OR I WILL TEAR OFF YOUR EYEBROWS!"

Dib released a snicker, unable to keep up the façade. "What, is the mighty Irken Invader afraid of a little girl crawling out of a well?"

Zim growled, giving Dib a deadly glare, finally managing to snatch the remote away from the human. Dib looked far too amused for his own good. "You think you're funny, do you?" he asked, his tone dangerous.

Dib let himself give a full-on laugh. "Sorry. I just had to see how you would react."

Zim continued to narrow his eyes before he smirked wickedly. "Why don't we see the nice videos Gaz sent me, hmm?"

Dib gave him a confused look. "Huh?"

Zim merely began scrolling through the choices on the screen before clicking the select button, not even giving Dib a chance to read what it was. However, as soon as the footage revealed itself, his eyes widened in horror.

"Hello, people of Earth!" a thirteen year old Dib said into the camera. "Today is the day! The day I show the world the terrible monster Zim really is!"

"Turn it off, Zim," Dib ordered, his face flushed with embarrassment.

"Holy Irk, your head was enormous," Zim taunted, keeping the remote well away from Dib. "I mean, it's still huge now but wow."

Dib leapt forward, tackling Zim down and reaching for the remote. Zim just cackled, successfully keeping it from the human's reach. Their tussle threw them to the floor with a hard thud, the remote skittering away across the carpet. They struggled against each other for a while before Zim managed to pin Dib down. He smirked victoriously.

"Ready to admit that I'm the superior one?" Zim asked mockingly. "And that you're nothing more than an awful, little, stink-beast?"

Dib glared up at the Irken. He hated that Zim usually had no trouble getting the upper hand. The fact that he could feel a bit of carpet burn on one of his arms added to his irritated state. However, he'd been training with Dek for months. In a quick flash he broke free of Zim's grip and flipped their positions, slamming the Irken's wrists down in either side of his head. Dib smirked at the other's baffled expression.

"I'm not thirteen anymore, Zim," Dib said, his tone low as he leaned in close to the Irken's face. "I haven't been training for nothing."

Zim couldn't help the shudder that ran through him. Having the human loom over him like this, those burning golden eyes focused entirely on him, it made his body respond in a way he had only experienced once or twice before. An ache between his thighs had appeared, beckoning for attention.

And if the bulge he felt pressed against him from Dib's pants was any indicator, he wasn't the only one feeling it.

Dib watched as Zim's face morphed into a look of evil mischief. He felt his stomach knot with nerves, not liking that expression one bit. However, he had not predicted that Zim would raise his hips up, bucking teasingly against Dib's sudden hard-on. He gasped, face flushing as he glowered down at the little bug. "Stop it, Zim," he said, unable to help how breathless he sounded.

Zim's smirk only widened as he started grinding against Dib more insistently. "Oh? But why?" he asked in mock innocence.

Dib growled. Zim wasn't fooling anyone. The Irken knew full well what he was doing. He struggled to keep his head, not wanting things to get out of hand.

But, damn, if that look in those ruby eyes and the way Zim was moving against him wasn't tempting…

His body acted before he had a chance to stop it, leaning down and kissing Zim almost violently. Zim responded eagerly, his tongue wrestling with Dib's inside their mouths. Dib began grinding back against Zim, moaning as the friction sent waves of pleasure through his whole body. He groaned at the muffled keens Zim was making as the Irken rolled his hips almost desperately against Dib's. Hands wandered and roamed, and soon both of them were shirtless, relishing in skin on skin contact.

However, Zim wasn't about to give in that easily. There was a flash of movement and Dib found himself pinned once more, this time by two of Zim's PAK legs.

"That's not fair, you jerk," Dib told him.

Zim leaned down, continuing to look horribly smug. "You should know better by now," he purred, drinking in Dib's shirtless form. Months of training had served him well, toning his lanky frame with lean, defined muscle. Zim pulled his gloves off and tossed them aside.

Dib's heart beat doubled in time as those exposed hands began undoing his pants. "Zim," he said in slight protest. He didn't want things to go too far, especially with him pinned like this.

"Relax, my little Earth-monkey," Zim nearly cooed, not making Dib feel the least bit reassured. "Zim is just going to help you with your problem."

Before Dib could say anything else he found himself choking on his breath as Zim's fingers began trailing up and down his fully exposed cock. Zim couldn't help how smug he felt. He had done an almost nauseating amount of research about this sort of thing, and he could tell by the way Dib flushed, how the human bit his lip to keep from making noise, that he was definitely doing something right. The Irken leaned in closer as he moved his hand up and down Dib's length at a slow and steady pace.

"Face it, Dib," he whispered against his ear, relishing in how the human failed to keep his needy moans quiet. "You are mine. Your body is mine. Your entire being is mine." He glance at Dib to find gold eyes narrowed angrily, but the way the human's member hardened even more in Zim's hand gave away how much he enjoyed those words. Zim leaned forward and bit at Dib's lower lip. "Now surrender to me."

Dib attempted to growl out a retort, but it came out more like a pleased groan. He furrowed his brow in frustration, resisting the urge to buck into Zim's hand. He needed to get free of these stupid PAK legs so he could fight back, but how?

Even in his fogged up state, a thought struck Dib, remembering what Dek had taught him the one time the hybrid had used his fake PAK in training. PAK legs weren't too different from an Irken's other appendages. He just had to distract Zim enough to get him to let go.

It was difficult, with his pants and boxers shoved down to mid thigh and Zim stroking his dick at an almost leisurely pace, but he managed to lift one of his legs and wrap it around Zim, bringing the Irken flush with his body. Zim let out a stunned squawk, which was cut off into a high pitched moan as Dib bit into his exposed neck. He continued to suck and bite, almost smirking as the hand on his cock faltered. Then, he felt the grip on his wrists loosen.

There was another struggle as Dib pushed Zim down to the carpet. His metal legs were successfully deactivated, shooting back inside the PAK. Finally, Dib managed to restrain the Irken's wrists above his head, easily gripping them with one hand. He trailed the other downward, pulling at Zim's leggings.

"Stupid alien, did you really think I would go down that easily?" Dib asked almost mockingly.

Zim gave him a murderous look, torn between being annoyed at, yet again, being pinned down, and being even more aroused at how much Dib had improved at fighting him. In the past had Zim ever managed to catch the human with his PAK legs it would have been the Irken's assured victory. His squeedlyspooge fluttered with anticipation as he watched Dib pull his leggings down to his knees.

Dib couldn't help but stare. Zim's anatomy wasn't like his, but it wasn't completely different either. A long, hard member jutted out from between Zim's thighs. It was maroon in color, smooth and glistening. It appeared to have come out of some sort of sheath, judging by the slightly pulled back skin that surrounded it.

Zim grew impatient, succeeding in getting one of his hands free from Dib's grip. He reached over and took hold of the human's dick once more, gripping it firmly.

"Zim!" Dib protested, having to let go of Zim's other hand to brace himself on the carpet so he didn't fall.

"You might want to stop staring and get to work, Dib," Zim said, pushing himself up to brush his lips against the human's neck. "I have quite the head start."

Dib glowered, moving his hand up along Zim's thigh and hip, making his way to the Irken's literally alien erection. He traced along the pulled back skin along the base, hearing Zim inhale sharply.

"Heh. You're pretty sensitive, aren't you?" Dib teased, his hand beginning to glide easily along Zim's slick member.

Zim's breathing became heavy, punctuated by small moans of pleasure. He nipped Dib's neck hard enough to bruise. "Shut up. You're not going to win."

"I wouldn't be so sure," Dib whispered huskily. His hand stroked Zim's cock with far more confidence, loving the noises the Irken would never admit to making. "You want me so badly."

A strange noise began to emit from Zim's chest. It sounded almost like a growling purr, reminding Dib of a some sort of big cat. The hand on Dib's cock, which had been lax for just a moment, reclaimed its previous rhythm. Dib felt sweat gather along his hairline, the fingers of his free hand digging into the carpet. God, it felt incredible to have Zim touching him like this. Zim's hand was smaller than his own, but it was soft and warm, and every now and then the Irken's thumb would caress the head of his dick on its way down. He did his best to contain the sounds he was making, but he felt like he was failing.

But he knew if he came first that Zim would never let him live it down.

"You – you're the one who always tries to claim me every time I so much as kiss you," Zim said through rapid breaths. Oh, Irk it would so easy to just give in. He could never put into words how amazing Dib's hand on his member felt. So big and hot, firm but gentle. "You needy, little worm."

Dib leaned forward and sank his blunt teeth into Zim's collarbone in retaliation, earning him a loud keen. That wasn't necessarily true. They were both guilty of getting caught up in the moment. "Says the one constantly putting marks on me," he growled. He figured this would be one of the only times he hated Zim's regeneration factor. He wanted to put his own marks on that perfect, green skin, to show everyone else just who Zim belonged to.

"You…should have marks on you," Zim told him, no longer able to resist bucking into Dib's hand. "You're…you're mine."

Dib's free hand left the carpet, reaching up grabbing the Irken by his chin, forcing them to make eye contact. "It goes both ways, Zim. So if I'm yours," he leaned closer, his mouth moving along Zim's as he spoke. Those ruby eyes fluttered to half-mast. "You're mine."

Something about those words, Dib's possessive tone, those golden eyes boring into his very soul, it tore right through Zim. He struggled to keep his rhythm on Dib's length, but all he wanted was to surrender, for Dib to give him sweet release. "Oh, I hate you so much," he moaned out, stroking Dib faster as he kissed him fiercely.

Dib moaned into the kiss, unable to even pretend to be unaffected. As they pulled away for air, Dib panted out, "Oh, God, Zim."

The competition was long forgotten, both of them fully giving into the pleasure they were receiving. Loud pants and moans filled the now sweltering room, punctuated by fervent kissing as they jacked each other off. Zim's free hand came up and wrapped around Dib's neck, his face nestling into the human's shoulder. Dib felt him tense, heard his moans go higher in pitch. And then Zim bit down onto the human's skin, muffling a loud mewl as he came hard into Dib's hand.

It was too much. The sounds Zim made, the hand on his dick, the bite on his shoulder. It all sent Dib over the edge right with Zim. He clung to the Irken just as tightly, crying out wordlessly with his orgasm.

As they came down from their high, Zim removed his mouth from Dib's shoulder. He took his hand from Dib's cock, wiping his offending fluids on the now soiled carpet. They would need to clean up before retiring for the night. He rested his head on Dib's chest. He'd broken the skin on his shoulder and it was bleeding slightly.

"That's going to scar, you jerk," Dib told him breathlessly. Now that the adrenaline had left him, he could feel the stinging pain of the bite.

Zim nuzzled under Dib's chin. "Mmm…it's not the worse I've ever done to you."

Dib couldn't help but grin. "Fair enough." He wrapped his arms around Zim and pulled him close. Zim only made a small sound of protest, but didn't try to escape the embrace. Dib leaned down and kissed the base of one of the Irken's antennae. He'd learned the hard way that touching any other part of the appendages could be painful to Zim, but he seemed to enjoy when the bases where kissed or caressed.

Dib pulled back a bit so he could look at Zim properly. He noticed how Zim's strange erection suddenly retreated back into his body, the pulled back skin closing around it. He felt Zim tug at his hair and yelped. "Hey!"

"Stop staring," ordered Zim, not looking as grumpy as Dib would expect.

"What, I can't look at you?" Dib asked, annoyed.

"Yes! I mean, no!" Zim snarled as he narrowed his eyes. "You are being a creep!"

Dib frowned. So much for basking in the afterglow. "You're a creep," he retorted.

"You're the one staring at me with your science-y eyes!"

Dib had no idea what Zim was talking about, but he honestly wasn't in the mood to argue. He was suddenly very tired. So, instead, he leaned forward and mumbled, "Shut up," before kissing Zim lazily. The Irken gave a short, muffled sound of complaint, but began kissing back anyway. They pulled away after a moment, their gazes locked once more.

Dib felt something stir in his chest. Those big ruby eyes were focused on him like he was the only thing in the entirety of space. Like he was all that exist. Like he was all that mattered. It made Dib's stomach do a summersault and his heart pound erratically.

It got worse as Zim reached up and cupped his face in his hands. The cool, soft skin felt so nice against Dib's still overheated cheeks. Zim leaned in and pressed there foreheads together before speaking in Irken. The phrase had Dib freeze all at once.

"I want you forever."

Dib continued to stare into Zim's eyes, looking for some sort of sign that maybe this was a joke. That phrase was a big deal to Irkens. He'd learned that from Midge and Matsuri. It was basically the Irken version of 'I love you.'

And Dib felt the stirring in his chest grow, and he could feel words in his mouth. Three little words that would be an appropriate reply. Three little words that were wanting to be said. Three little words that sat at tip of his tongue, that could deepen and solidify his and Zim's relationship even more.

And yet, he hesitated, unable to get himself to speak. What if this was just his pleasure sated brain causing him feel this way? What if he said those words only to realize he hadn't been ready to say them? That he didn't really mean them? He knew where Zim's feeling were. He had known for a while. And because of that he wanted to do his damndest to make sure he did this right.

And that included not saying or doing anything too soon.

Zim patted Dib's cheek a little too hard, snapping him out of his thoughts. "Come on, human. Your fluids are disgusting."

Dib gave him an unimpressed look. Well, at least Zim didn't appear upset by his lack of response. "You aren't exactly one to talk," he said, indicating the stray strip of bluish-green cum on his belly.

"Nonsense! My fluids are perfect," Zim said, pulling Dib up from the floor. They both had an awkward moment of resituating themselves before retreating to the bathroom to clean up, using a couple of wash clothes. Dib noticed that they really needed to take a trip to the laundry room soon. They'd been so busy with everything else that chores were getting neglected.

As they exited the bathroom, Dib suddenly asked, "Do you...wanna stay with me tonight?"

Zim looked up at him and squinted an eye. "Eh?"

"I mean.. you don't have to if you don't want to." It was ridiculous, but after having such an intimate moment, Dib didn't want Zim away from him, even if it was one room away.

Zim continued to stare, looking at Dib like he was saying something stupid. After a long pause, Zim responded with a smirk, "I suppose I could stay with you, my poor, lonely, human."

"I'm not lonely! It's just..." There was so much going on, so much that lied ahead, and Dib suddenly found the idea of sleeping alone very bothersome.

"It's alright, Zim understands," said Zim, patting Dib's bare chest. "But no snoring! If I hear you snore I will rip out your spleen!"

Dib rose a brow. "Do you even know where my spleen is?"

"...Yes."

"Uh huh."

They headed to Dib's room, bantering and teasing each other as they went. Dib could still feel those three little words swirling in his head, squeezing his chest. He felt the urge to say them aloud, and also the need to keep them to himself for now. There was no need to rush anything, after all. They had plenty of time.

Next time, he told himself, Next time.

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I have literally become nothing more than human cheese ball. I am so sorry.