"You can have this one," Zamasu said. "I won't interfere."
Black nodded as he left the cabin, eager to crush the mortals left on Earth. If he wanted Earth devoid of life before, he wanted it even more now. He wanted this planet gone; a distant memory full of disappointment.
He razed cities to the ground, easily picking off their inhabitants in groups. The technology these humans possessed was amazing when he stepped back to consider how far they had come, but it was their downfall; the fuels they used went up in flames so spectacularly.
He tired of it. This was quite a large planet, and each place he went to, he saw the same thing. Just as he turned to head back, he was faced by a flying mortal. Oh? This was the first flying mortal he'd seen so far.
"Who are you?!" The mortal yelled, voice laced with anger. "You're not Goku!"
Black was practically beaming at those words. "Certainly I am not. But you know Goku, do you? Where is he?"
"Goku died before I was born! You're an imposter!"
Black's smile faded, but still, to recognise him without having met Goku was something, right? "Who are you?"
"I'm the one who's about to stop your rampage!" He pulled out the sword on his back and dashed towards Black.
This one sure was feisty! He had some moves, and certainly was the most challenging mortal he'd come across, after Goku of course. Finally he had an opportunity to flex his muscles and try out more power. Yes, this was good. He felt better than he had in days.
Still, this mortal was no match for him. He punched the man in the stomach, rendering him immobile. "Who are you?" This was no ordinary human.
"Trunks," he coughed out.
"Well, Trunks, this has been fun." He geared up to deal the final blow, but let the energy dissipate, instead just dropping the man and hoping he'd survive. Perhaps he could get a bit more out of this mortal before finishing him off. Yes, he'd save him until last.
Ooo
Black called on Trunks day after day, to the point where he was starting to wonder if he should have finished him off on the first day they met.
"What's taking so long?" Zamasu asked.
"I'm enjoying this," Black said.
"It's boring. Just finish that boy off and let's move on."
"Now, now, let's not rush through this."
Zamasu didn't look impressed. "Now that saiyan brain is making you enjoy this sort of thing too? They were a warrior race renowned for their violence and persistence. They got stronger each time they fought."
Suddenly it made sense why he kept pushing Trunks to his limits and having the both of them come back stronger. He had seen Trunks use the super saiyan transformation so often now, but could he improve on it? Make it his own? "This is the only planet I'm really interested in, so just let me revel in it a bit longer."
"Fine. But I'll get involved if you take too long."
Then the day he didn't know he was waiting for arrived. The day that Trunks travelled into the past, and he was able to meet Goku once more. As he fought Goku on that bright Earth day he wished more than anything that Zamasu was there to watch him; to see this fight and say, yes, this is why I stole this man's body!
He was pulled back to the future all too quickly, but it was enough to satisfy him. Now his doubts were allayed and he found his self-confidence once more. He recounted his day to his counterpart, who listened with great interest for once.
"If Trunks has gone back in time, he must return," Zamasu noted. "Perhaps he will bring company."
Black's eyes lit up. "By your name, I hope he does."
"And if he does, I want Goku all to myself."
"As you wish." He had no problem consenting to that; surely giving Zamasu the opportunity to kill Goku would show him exactly why his choices were justified.
Ooo
"Super saiyan rosé? You hid that well," Zamasu said with a laugh as he looked out over the forest. "What an elegant name."
"I didn't want to spoil the surprise. You liked it then?"
"I'll admit I was slightly jealous that I can't achieve such an eye-catching transformation. But then I am the perfect version of myself."
"And what did you think of Son Goku?" Black had been eager to ask.
"What an interesting mortal. I understand it now. He certainly has some strength behind him." Zamasu touched his face where Goku had dared to lay a hand on him.
Black put a hand over Zamasu's. "Tell me I was right." He craved validation.
"Yes… They both surpass me. I only did as well as I did due to my immortality." It was not a fact he wanted to admit, but it was the truth. Black's resilience was to be admired; his body was still fighting fit even after all they had endured against the saiyans. "We did well together. Our best combined effort yet. The synchronisation we achieved was incredible; we really played to each other's strengths."
"My favourite part was when we told him what I did to his family. We were so perfectly attuned in our story-telling. And the pain and anger in his eyes…I could have watched all day."
Zamasu nodded. "It was quite alluring. Did you decide to stab me in the process as a way to get back at me for not accepting your new body soon enough?"
"Not at all. It was merely the easiest way to do so. He wasn't expecting it in the slightest. And it reminded everyone that your immortality is everlasting." Black turned Zamasu towards him ran a hand over the place he'd pierced. "How was it being so close to a mortal?" He pushed Zamasu up against the railing they'd been leaning on, arm hovering just above his shoulder; no wall to push against.
Zamasu twisted and swapped their positions. "This is more accurate. Except, being so close to Goku I could see how truly different the pair of you are. Those disgustingly huge muscles he leaves bare, that stupid expression he wears… I could go on. Everything is infinitely more beautiful about you. You've made that body your own, and I can see that now."
"Be careful," Black said, "Anyone would think you were flirting with me."
"Maybe I am."
Silence fell as grey eyes stared into black ones. Zamasu let his hovering arm come to rest on Black's shoulder, the other tracing his jaw. Yes, he was curious to know more about the other now, and all he had to do to get that started was the lean in a little closer. He'd been thinking about it all evening, but the act was more difficult than anticipated, especially now Black was watching him so closely.
He just had to bite the bullet. He wasn't about to kiss a mortal, he reminded himself.
Black could see the cogs turning, the hesitation, the way Zamasu was edging slowly closer. All he wanted to do was lean forward and close the gap, but he restrained himself, his mouth curling as he watched everything unfold.
"Shut up," Zamasu said as he noticed Black's smirk.
"I didn't say anything. Maybe you should be quiet; I can read you like a book."
"Then you'll know I've never done this."
Black stifled his laugh. "Yes, of course that's what you're fretting about most. Not the fact I look like a filthy mortal."
Zamasu pouted before grabbing the front of Black's shirt and pulling him in for a very awkward kiss.
Black rubbed his nose. "Slow down." He brought them in again, slowly tilting his head for a better angle. His lips seemed to move of their own accord against Zamasu's.
"Since when were you so good at this?" Zamasu asked.
"Perhaps this body has muscle memory left in it? But how would you know I'm good at it if you've never experienced it?"
Zamasu could feel the heat in his cheeks. "Sometimes you just know. It… It felt nice."
"Nice? Of all the words in our extensive vocabulary you chose that one? I'll have to do better."
"Seems your touch is already affecting me."
Black wasn't sure how to take that – was Zamasu being an asshole or not?
Noticing the frown, Zamasu clarified, "Maybe we should take this inside." He took Black's hand, leading him.
"What's with this change of heart?"
"I'm finally comfortable with the idea," Zamasu said. "You know I'd fuck myself. This just took a bit of getting used to."
Black felt elated on hearing that. This meant that he had finally passed all the tests, and he was truly Zamasu. He had hoped he had found acceptance earlier when Zamasu actually called him by his true name, but he hadn't been sure if that was just for show in front of the saiyans.
"You still want to, right?" Zamasu asked. "I assume it was me you were thinking of when you were getting off – of course I heard it all, or did you forget how sensitive my ears are? I'd like to know exactly what you were fantasising about."
Black was surprised at how Zamasu seemed to be control of the situation. He always imagined he would be leading. "Who else but you?" He tried to pull Zamasu into the kai's room, but was stopped.
"Perhaps you imagined you'd have me in my own bed, but I'm not having whatever disgusting fluids that come out of that thing over my sheets." He pushed open the door to Black's room. The rooms were mirror images, and Black's was as clean and neat as Zamasu's own. He expected nothing less of himself.
"Been watching, have you?" Black asked with a smirk.
"Don't be ridiculous. It is simple deduction based on most reproductive mechanisms, or have you forgotten the amount of studying we did in favour of just toying with the real thing?"
"They call it a dick most commonly."
"Noted."
Black pushed Zamasu onto the bed. "Obviously I imagined I'd be naked, but I understand if you'd rather I wasn't entirely."
"I'm used to the sight." Realising that wasn't at all complimentary he added, "Besides, I want to feel your skin against mine."
Black began to undo his sash, but Zamasu stopped him.
"Allow me. I know you'd much prefer me to undress you, right?"
"Naturally." He let his hands drop and Zamasu's replace them.
Black was easy to undress; no ridiculously complicated knots or fiddly buttons. For the first time Zamasu took time to run his hands over his bare scarred skin. His touch was delicate, stroking his arms before tracing his chest muscles. Then he moved his finger in circles over a nipple until it hardened.
"Are you saving the lower half for later?" Black asked with impatience.
"Just having a little fun on my way down." Zamasu looked up with a smirk. "Am I teasing you? Does this body have such a low tolerance?"
"It's certainly more responsive than my old one ever was."
Zamasu placed his hands on Black's hips and slip them down, taking the trousers with them. Black stood there with them pooled at his calves, not having thought to take his boots off beforehand. "Disgusting." Still, he reached out to touch the thing between Black's legs, his curiosity greater than the repulsion he felt. He enjoyed the fact Black's breathing fluctuated and his brow furrowed as he played around with the appendage. Did it feel good? He couldn't tell from Black's reaction. For now he was merely inspecting the thing and how it worked, nothing more. "Why does it look shrivelled?" he asked as he gently squeezed the balls, earning something more akin to a moan from Black.
"I don't know. If you don't like it, don't look at it."
Zamasu ended his inspection and motioned for Black to rid him of his clothes too. Naturally he loved being naked in front of Black; reminding him how perfect his body was, and knowing that Black was the biggest admirer he would and could ever have. With expert hands, Black rid the kai of all fabric, pushing him back onto the bed and pulling his boots off to finish the job. He took a moment to sort his own tangled feet out too before joining Zamasu among the sheets.
"Now let me demonstrate how this works." He took his dick and began to pump it, not trusting Zamasu to do a good enough job.
"Oh my, it's… It grows?" He remembered reading something like that in a scroll, but it was a detail he hadn't focused on. Slowly he reached out and touched it again, this time it was hotter and harder than it had been, and now as he repeated the motion he knew Black was enjoying his touch. "What did you plan to do with it?"
"Would you suck it?" Black asked, trying his wildest fantasy first.
"I think not. I've only just allowed my mouth to touch yours. If I were you I'd store that idea for far in the future." The thought of pleasuring a mortal in such a way was beyond him. Black would have to do it for him many times before he even entertained the idea of repaying the favour.
"I thought as much. That's a rather new idea." He ran his hands over green skin, realising that Zamasu was probably barely turned on at this point. "But, you see, I know what gets you off, and I thought I'd use my new toy to pleasure you directly."
Zamasu couldn't help but smile, having hoped that Black would offer exactly this. He opened his legs and cast his eyes south. "You could give me a bit of attention first though."
Black grabbed a leg and began to kiss from the knee down the inner thigh until he reached the folds between Zamasu's legs. Without pausing he dived in, swirling his tongue around the nub between them, feeling the way Zamasu's legs tensed as he did so.
"God am I blessed to have you here. Your mouth is certainly better than anything my hands have ever achieved."
Black flipped Zamasu over when he deemed he'd done enough to arouse the kai. He gently grazed his teeth against the soft flesh of an ass cheek before dragging his tongue up the crack.
"Is that the only lubrication you intend to use?" Zamasu asked as Black continued to tongue at his entrance.
"It's not like you haven't used less, or is my future self of a softer disposition?"
"I do enjoy a bit of pain, but I suppose I'm more concerned that the object to be inserted won't be controlled by me."
"But I am you." Black stroked Zamasu's back. "I'm surprised you have any concerns after the thing I put through your body earlier." As he looked down he could barely remember which side of Zamasu he'd shoved his fist through.
"You're right. Perhaps I won't be able to feel anything. I'll be disappointed if that's the case."
Black pressed his cock between Zamasu's cheeks, slowly grinding against him before pushing in, surprised at how tight it felt. Sure he'd put bigger things in before, but he guessed that was no comparison for being the thing that's inserted. He wondered who would enjoy this more. His movements were slow to start; getting used to the feeling of being surrounded, and how that tight ring of muscle felt as he slid out and in again.
Beneath him Zamasu shifted his hips until he found the perfect angle for Black to penetrate him with. When Black finally hit his sweet spot he let out a moan to let him know. Black grabbed hold of Zamasu's hips, making sure neither of them lost that position. Now he pounded into Zamasu faster, knowing they were both satisfied with how this was playing out. There was no need for words; they could both read each other's bodies and sounds perfectly.
Black's new body could go all day in a fight, but it seemed it hadn't been disciplined in all areas. He could feel his climax fast approaching, but he knew Zamasu had barely even started enjoying this.
"Can I come in you?" Black asked.
He hadn't really thought about that, but his immediate reaction was disgust at the thought. "No. I want to see what it is before I consent to that." Black pulled out and Zamasu turned over, watching as he continued stroking himself. "Really? That's it? I expected something longer-lasting than that."
"I need to train this body." He laid down next to Zamasu, knowing his counterpart wouldn't appreciate him releasing all over him, instead letting it pool on his stomach.
Zamasu looked down at the panting, sweating mess of a man. "You're quite noisy, you know."
"Why wouldn't I be when I've no longer got anyone else around to hear me?"
Zamasu nodded; it was a fair point. Perhaps he would find he'd do the same when Black returned his attentions to him. "Why are mortals so messy?" He reached out a hand and poked a finger into the cum, inspecting it. For a brief moment he entertained the idea of licking said finger, but realised he was far above that. It's not as if he would ever agree to swallow this, even if he did suck it. Quickly he wiped the finger on Black's chest, and then again on the sheets for good measure.
"You don't like it?" Black asked as he grabbed some tissues from the bedside table and wiped himself clean. Zamasu wondered if this was the sole purpose of keeping the tissues there.
"I wouldn't like to possess such an ability."
"You'd change your mind if you had this body."
"Clearly I would. But I don't. Now why don't you continue worshipping me like the god I am?"
Black smirked. "Of course. I must make up for my sin of finishing far too quickly. How would you like me to do my penance?"
"That tongue of yours is quite talented. I'd quite like it between my legs again."
"As you wish."
Black wrapped his arms around Zamasu's legs as he settled between them. Now that he was satisfied he found he could work as slowly as he wished. It was painstakingly slow to the point where Zamasu couldn't even tell if there was any direction in Black's ministrations; it just felt like something tickling his nub – it could have been a feather. Still, it was a pleasant sensation, and if Black wanted to tease him for hours, then let him do so.
Perhaps it was the lack of vocal response that led Black to work a little harder. Yes, that swirling motion he'd used earlier returned and for that Zamasu gave a small sigh to spur him on. As much as Black wanted to tease his counterpart in ways he could never achieve on his own, he realised that by being separate entities he had the power to drive the other insane with his touch. He bet he could make Zamasu come faster than ever, and he wanted to prove it. After all, it wasn't that long ago that he had inhabited that body and known the torture he had to put it through to feel anything good. Naturally he'd blamed his sudden indifference to pleasure on the fact his mind was preoccupied with bigger, more pressing issues.
Zamasu let out a moan as Black pressed his tongue harder against his nub. This was going to be the best orgasm of his life, he could already tell. He was surprised he hadn't heard stories of people abusing time for their own satisfaction like this, but perhaps that's why it was a privilege only given to Supreme Kais. There would never be anyone who would be able to make him yearn like this. Black knew his own body as well as he did, and he knew exactly where to focus his attentions, and how long for. An arm around his leg uncurled itself and Black inserted a few fingers inside him. They both knew Black wouldn't be able to hit the right spot like this, but just the feeling of something inside him set him alight.
"God…" He had wanted to call his counterpart's name, but that was a strange choice to make. It was weird to call him by his true name, because that was his name too. Yet to call him by his new name seemed a bit ungrateful at this moment. He knew that Black would much rather hear him call his true name. Still, he had managed to get through their time together by mostly avoiding naming him at all. It was easier that way.
Zamasu shifted, raising his hips and arching his back a little. Black knew this familiar pose; the kai was on the edge now. How tempting it was to stop – sit back and enjoy the view. Perhaps he would even beg for release. The one problem of having his face in his counterpart's groin was he couldn't see his beautiful face, and couldn't whisper anything to spur him on. Next time he'd just have to last longer, or perhaps prop Zamasu on a pillow so he could at least look up at what he could only imagine was a flushed, lust-filled face.
For anyone other than a kai it was difficult to determine the exact endpoint, but Black knew precisely when Zamasu peaked; everything tensed for a few seconds, and then slowly the kai relaxed into the bed with an exquisite moan of satisfaction. He continued to gently tease the nub until the moment before Zamasu thought he might actually have to say something. But no, Black's timing was perfect.
"Can you really class that as your first time? Or was it just another form of masturbation?" Black asked as he came to lie beside Zamasu once more.
"Is that what you were thinking about down there?"
"Well I was going to say something along the lines of that's the best sex a pair of virgins have ever had, but then I wondered about the real meaning of that word and if it applied."
"The best? No, this was just a practice run. You'll perform better next time. Although I would say no, being as we are two separate people, it is not masturbation. It was far too good to be categorised as such." Zamasu stretched and rolled onto his side to face Black. "But do you not agree that the term 'virgin' is only applicable to reproductive species? Applying it to us is like asking if we've ever driven a vehicle; it's just another thing you've either done or haven't. There's almost no value in the knowledge."
Black looked thoughtful. "…Wait. Do you think I could reproduce in this body?"
"I don't want to know," Zamasu said, the disgust evident in his expression. Would the offspring be part-god? Would they have any essence of himself? "And we never will because you will be the only semi-mortal left in this world when we're finished with it."
Black nodded. "You must know I never would have tried."
"I know, but the fact that some of these ideas don't immediately repulse you concerns me a little. Those are the times I wonder if that mortal brain has changed you mentally."
"I guess I just have a slightly different perspective after inhabiting this body for so long. You have to adapt your ideas, otherwise you'd go insane with self-loathing. That aside, did you want to do anything else?"
"Like what?"
Black shrugged. "I'd quite like to hold you close now you've let me in."
Zamasu frowned. "I've purposely kept my distance. I feel disgusting and you have a sheen on your skin that says I don't want to go anywhere near you before a bath."
"Fair point." Black got up. "I'll meet you in there."
Zamasu sighed as he lay there. He didn't want to get up, but at the sound of the taps running he rolled over and out of bed.
Being in Black's arms was a feeling he didn't know he could feel. He felt safe and protected, but most importantly at peace. Whatever he was thinking, he could say it now, and know that the one who held him would understand and agree. The saiyan body against his back was warmer than his own, but it wasn't unpleasant; in fact he rather enjoyed the sensation.
As they talked about everything from the universes at large, to their following grand plan: the search for the perfect tea leaves, Black gently kissed his head and neck. The soft, gentle touches eased his troubles away as he asked how long it would take to complete the Zero Mortals Plan. Their guesses were that they'd be at this for years…centuries…possibly millennia.
"Just to travel to them all will take time. We've killed our greatest knowledge in each universe just to get this far. Without each Supreme Kai to show us what lies in each universe, we'll just be on our own picking off planets as we come by them," Black said. Still, there were no regrets in what they'd done; they would have had angry destroyers on their backs otherwise.
"Well, we'll get their eventually. What's a few millennia in our lives? Maybe by then you'll be able to outlast me in bed. Perhaps you can even bring super saiyan rosé into the mix."
Black was quiet. "This body may grant me the power to deal out divine justice, but I'm not sure how long it will last. Even kais age and die. I may prolong this body's life by inhabiting it, but certainly it will cease to function in a shorter timespan than you might like."
"I hope you didn't trade in for one too short."
"We'll just have to work faster. But it doesn't matter, because you will live forever. You'll be justice incarnate until the end of time and beyond. That is all that matters to me."
"No. There is a way for you to be with me until the end." Zamasu reached up and fondled his potara. "Let's not be hasty though – I'm not yet bored of us in separate bodies." And, although he didn't say it, he wasn't yet entirely comfortable with the idea of fusing and tainting his perfect being with that of a mortal's. "But when the time comes, we'll both see this to the end."
A/N: This fic was sponsored by tATu's Nas Ne Dogonyat, specifically the 2018 DjStately remix.