I still do not own Yu-Gi-Oh!, because this story is not in the series- and there is more than one version.
WARNING, THIS STORY CONTAINS A LEMON THAT MAY OR MAY NOT BE CONSIDERED GRAPHIC TO YOU. I MADE IT AS DESCRIPTIVE AS A COULD, IF YOU DON'T LIKE LEMON'S THEN JUST STOP READING THIS STORY BECAUSE IT IS MOST LIKELY GOING TO HAVE A TON OF THEM. kthx •3•

Yugi took a step back, looking up into Dark's big blue eyes. He admired him for a moment, not quite sure what to do next- though he already knew what he wanted to do. His eyes began to roam over the taller male, but he blushed when they saw his staff, remembering what he had witnessed earlier.
Dark had noticed the slight blush and wanted so badly to run off and hide, but was only able to blush brighter than a tomato on fire. He tried his hardest to at least put the staff behind his back, but he was completely frozen in his stance.
Yugi glanced up through his bangs, noticing Dark was embarrassed. He giggled slightly,
"I guess I caught you at a bad time before, huh?"
Dark, able to respond to the question, nodded,
"Kind of..."
Yugi shivered slightly at the surprisingly deep, or deeper than he had expected, voice. He always thought he would sound like Mahad when he had met him in the Pharaoh's memories- it was similar, but deeper. He subconsciously stepped forward, something inside of him clicking that made him much more confident and wanting. He reached up and pulled Dark's head down closer to his own.
"Were you at least enjoying some alone time before I interrupted?"
Dark blinked, finally looking down at him.
"I wasn't a-"
Dark had been cut off by something warm and soft against his mouth. It took a moment to register exactly what was happening, but his eyes widened. He wanted to pull back and stay loyal to Chaos, but he couldn't disobey his master. Even if he wanted to, it was physically impossible. Even his lips began pressing back on Yugi's. He mentally cursed at his lips for falling prey to the young master,
"Fucking two-timing lips, obey me! He may be my master, but I am yours! You have to stay true to Chaos- No matter how soft or...sweet..or warm..or.."
Dark slowly fell pray to the kiss, his eyes progressively slipping closed.
Yugi wrapped his small arms around the taller's neck, trying to keep their lips connected as he was standing on his toes already. He dropped back onto his feet panting, looking up at the other lustfully.

Dark slowly opened his eyes and looked down at him. He wondered when exactly he wrapped his arms around the other, but it was too late to move them- and his staff had fallen carelessly on the floor. He was scared; not just because his master looked like he was about to rape him, but because his own mind was beginning to turn on him; the urge to obey his master was too great.
Yugi began struggling to get back on his toes to reach Dark's mouth, and without even asking for help, Dark placed firm, strong hands on his waist and picked his up. Yugi was surprised at how easily and gently he was picked up just from his hips, but he was more caught up with the sudden lips on his.
Dark had absentmindedly picked up Yugi and kissed him as soon as he noticed the struggle. It's in his nature to assist his master when he is in need of any kind of help- even without being told. Dark always thought of it as an honor to help and obey Yugi, but now it's more or less a curse.
Yugi savored the softness of the kiss, but after what felt like eternity, he needed more. He put his hands into the hood like hat and pulled Dark into a much deeper and heated kiss, his hands tangling in to purple locks.
Piercing blue eyes shot open as a timid tongue flicked out against the part of his lips- and his lips allowing access.
Yugi moaned at the unique taste of the other; it was almost electric. He felt a current course through his petite body, causing him to shiver as he explored the moist caves every dip and crevice. He rubbed and twisted his tongue around the other's in a wet dance of passion and lust. His thin legs wrapped around the magician's waist, pressing them as close as possible.
Dark felt something rather hard against his stomach, and it made him nervous. He tried his hardest not to think about what it could be, because he knew his body would obey his master if it realized it. It was no use, however. Somewhere within his brain knew what it was, and that was enough to make him respond. A rather large tent grew in the purple silk, standing at full attention to Yugi. The small boy was barely high enough to miss the erection bigger than his head (minus the hair, of course. Dark was big, but not quite that big.)
Eventually, the need for oxygen overpowered the small duelist as he pulled back gasping to catch his breath. Clouded athymest stared into frightened but wanting aqua. Yugi had shifted just right to feel the tip of the thinly clothed hard-on on his bottom. Smirking, he let his eyes dart between the bed and Dark while he wiggled his hips on the bulge.
Wishing he didn't notice the half-lidded eyes briefly dart back and forth, the terrified Magician's feet began walking to the bed as he suppressed a moan. He could at least control his vocals- for now, anyway. Setting Yugi down beside the bed, he looked down at him hesitantly waiting his next command. Instead of a vocal command, Yugi pushed Dark backwards onto the plush mattress.
Yugi pulled Dark's hat and shoulder pads off almost instantly, leaving him in his silk tunic and bodysuit. He began kissing along Dark's jawline as his small hands found their way to the bottom (or as close as they could get to the bottom) of the tunic. He slid his hands up under it and ran his hands along the skintight body suit until it was around Dark's neck.
Dark had obediently arced his back while his master did so. He wanted so badly to object, but he couldn't say no to him. Not just out of loyalty, either- it was completely impossible unless it was the only answer.
Yugi pulled back and ripped the tunic off impatiently, wondering how the hell he would get the bodysuit off of Dark. How did he even get it on? It had no zippers or anything, and hid absolutely nothing. It looked almost like body paint, it was so tight and smooth- only Yugi knew better because a certain area was still covered. To stall so he had time to think, Yugi began teasing his own tank top over his stomach and chest to give Dark a good show. He looked like he could be a professional stripper the way he moved and teased the other.
Dark was falling deeper and deeper into his trance.
When the shirt was gone, the puzzle fell back against his chest and the chains clinked. Yugi unbuckled his belt, next, taking it off slowly as he brought it around behind Dark's head and used it to pull him up into another kiss.
Dark obviously didn't resist.
Leaning Dark back once again, Yugi began unbuttoning his leather pants and wiggling them off.
Dark blushed seven shades of red when he saw Yugi hadn't worn any underwear, and a rather proud erection sprung free, almost flat against his stomach.
Yugi never wore underwear, his jeans were too tight, and they left lines; so he finally started going commando. A smirk played on his lips as he stayed sitting up a while longer.
"Enjoying the view?"
Dark, realizing he was staring at the member, quickly darted his eyes up, but his head betrayed him and nodded. His face grew an eighth shade of red at that.
Yugi blushed ever so slightly. He was way past out-of-character- he was a whole new person from his normally innocent self. He ground his hips against Dark's still painfully clothed erection, wanting nothing more but to free it from it's prison. He decided to try stretching the suit down around Dark's shoulders, but it was too tight to get his fingers into. His brows furrowed together in thought.
Noticing the trouble, Dark's mouth started speaking independently, quietly reciting a spell as his body suit and boxers, thinking one step ahead, faded off of him and appeared neatly folded on Yugi's desk. Dark objected silently.
Impressed by the magic trick, he smirked down at the site before him. His eyes trailed further and further south until they came in contact with the slightly longer than a foot-long erection. His eyes widened tremendously at the thought of that monster inside of him. It was truly a site to see, the perfectly smooth, stiff erection standing proudly, framed by it's shiny, perfectly groomed, purple hair, the tiny beads of precum that had snuck their way out glistening in the feint moonlight. He thought he was going to lose himself before the fun even truly began.
Dark now had ten different shades of red lit up on his face. He wanted to cover himself back up, but it proved even more impossible when Yugi slid down and flicked his tongue out against the ever-so-sensitive slit. A shaky, throaty moan escaped his lips at the sudden pleasure as he lurched forward in response.
Yugi felt proud- he has touched himself many times from bottled up emotions, but he's never done it to another. Well, aside from a few dreams, so he used combined knowledge to try and make it as plesurable as possible. He took his index finger and thumb and placed them just below the head, rubbing his shaft with slight pressure as he blew lightly across the tip. His free hand soon found it's way to Dark's sac as he rolled it between his fingers, enjoying the feeling. At the same time, his mouth had found its way around Dark's head, the tongue deviling down into the slit and swirling around.
Dark threw his head back, moaning helplessly as the pleasure took over his body. His released loomed near at the combined pleasure of the wet heat around the head, the pressure at the base, and the softness at the sac. Yugi's mouth was too small to fit any more than the head, so he wrapped his hand as tight around the shaft as he could (which his hand was also too small to reach all the way around it) and pumped him rather quickly, while his tongue worked expertly on the head- lapping up the stream of precum as it began spilling out; as his other hand gently tugged and massaged his balls.
After only a minute more of the pleasure filled torture, Dark came hard and long into Yugi's mouth, giving him a good taste of the sweet substance, though most of it ended up on his face from trying not to choke on it. His body trembled from the orgasm, but he knew it wasn't over yet.
Yugi crawled back up the tall, lean magician, staring down at him.
"You taste so sweet, Dark Magician. Try some."
At the command, Dark had propped himself up with his elbows and began licking his own sticky seed off the boy's face. It had a strange taste to it, that he hoped he would never have to taste again, and wish he could stop tasting- but he couldn't until it was all gone. He even licked his lips when he laid back down.
Yugi loved the feeling of the soft, warm, and wet tongue on him.
"How's it taste?"
Dark scrunched his nose up, trying to look disgusted, though he ended up looking so adorable and sexy to Yugi.
"I've had better."
Yugi simply giggled as he stuck two fingers by the magician's mouth.
"Allow me to rid of it, then. Suck."
Dark obediently took the fingers into his mouth and swirled his tongue around each finger, sucking them, and even slightly chewing on them.
Yugi moaned, retreating his fingers as he trailed them to his own entrance and circled it.
Dark watched, confused, but intrigued by the site before him.
Yugi slid one finger inside of himself, pumping it slowly to try and get used to the feeling before adding the second. He wiggled his bottom against the fingers as they pushed and prodded their way in and out of him. He moaned lightly, pushing back on the fingers as they prepared him in a scissoring motion. He suddenly gasped and shot up with wide eyes as he brushed his own prostate. He even startled Dark. After that, he removed the fingers and sat above Dark, lining himself up with the still very erect length. He was nervous that it wouldn't all fit.
Dark's hands were pulled to the smaller's waist as he slowly sat down on his length, pushing it deeper and deeper inside the extremely tight heat.
Yugi winced as the monster cock was filling him to the brim. Inch by inch he took in Dark, not stopping 'til he was sitting on him completely. He groaned a mix of pain and pleasure as the member barely missed his prostate. He felt another current surge through him, similar to the one he had felt earlier, only this time it was stronger and traveled up instead of down.
Dark's eyes were screwed shut, biting down on his lips to suppress any noises or his body from taking over. If anything, he at least didn't want to be the one doing this- he knew he'd have to tell Chaos sooner or later, but it would go over much better if he didn't do anything he could control.
Yugi's face slowly shifted into pure pleasure as he began lifting himself as best he could, struggling slightly to get the motion right.
Dark's hands acted before he even registered Yugi was moving, lifting the boy up at the same pace he had tried to lift himself, and slowly letting him back down.
He made it look so easy, lifting Yugi as if he were a mere feather. His hands felt like they barely even touching the young duelist, yet he could hold lift him over his head if he wanted to, without even putting an ounce of effort into it. Yugi admired it, and him. Dark's muscles were perfectly toned, and his skin was flawless- not a single freckle or scratch adorned the smooth, soft skin. He looked so human, yet so not. It was strange, but it drove Yugi absolutely insane. Just watching how his muscles moved when he lifted him made him want, no, need more. He tried bouncing himself faster within Dark's grip, which made Dark's "curse" activate once again.
Dark's hands betrayed him as they guided Yugi faster and harder to meet his master's needs. His lip almost bled from how hard he tried to suppress noises; whilst Yugi moaned freely.
It took Yugi a little bit before he realized he only heard himself moaning. He glanced his eyes over toward Dark and frowned through another moan as his prostate was struck dead on. Everything was white for a moment before he put a shaky hand on Dark's smooth face. He tried to talk through his moans,
"Wh-Why are you hiding your-pleasure from me? Let me know you feel good—too."
With that, Dark's teeth released the abused lip letting out a long overdue moan,
"Master~"
Yugi blinked at the name, slightly confused. He wasn't expecting that, but it turned him on even more. It reminded him of a video Joey had gotten him for his 16th birthday as a joke. It was labeled something about Duel Monsters, but it was actually a scene of two men role playing. One was a slave, and the other was his master. Yugi watched the video many times over, though he never told the blonde- he simply smacked him the next day as if embarrassed and angry. But the remembrance of the video only made him even more lustful.
Once again, Dark's hands were guiding the slim boy even faster, only they picked the pace up to their full speed- which was pretty damn fast considering Yugi was like air to him and he had such large muscles.
Yugi gasped in surprise, his eyes shooting wide as his prostate was struck dead-on repeatedly. He arced his back as far as he could, grabbing at whatever he could (which happened to be Dark's wrists), a series of rapid chant-like moans escaping in time with the thrusts.
"Yes, yes, yes, so good, yes, oh god, oh god..."
Dark too was now forced to moan, his head thrown far back into the pillows. He couldn't release until after Yugi, however, no matter how achingly close he was. He just wanted it to be over with already.
Yugi, however, never wanted it to end. He felt so close, yet felt like he could hold off his release forever, just to cherish this moment he has dreamed so many times about.
Sweat rolled down both of their bodies as if they had just walked in from the rain, and both their hair became shaggy and tangled. It had only been mere minutes but it felt, and looked, like it had been happening for hours on end.
And finally, with one blindingly direct and hard thrust to his prostate, Yugi screamed to the heavens as his hot seed shot all over Dark's chest and even his face.
And as if on cue, Dark lost himself inside Yugi, cumming for at least the 3rd time that night.
Yugi collapsed on him,already passed out from exhaustion in Dark's arms.
Dark used his curse to advantage at this moment, cleaning them both up so they weren't all sticky and sweaty. It was rather awkward to clean Yugi as his cum poured out of his back side. Dark never noticed that his cum was purple until then, though. It made him feel like a living grape from all his purple attributes. He simply shrugged it off and dressed the young master and himself quickly, being forced to stay until dismissed when Yugi awoke. He simply laid back down next him, the unconscious boy immediately drawn to the source of warmth and tangling around it.

Yami, who remained within the puzzle, saw the whole thing.
"Next time," he thought, "it's my turn."

(Main plot informative;
Chaos remained completely oblivious to the whole situation, fore he had passed out on Dark's couch.)

Sorry it took so long, btw. I've been caught up in many, many things...(Mostly watching a bunch of yaoi shows .-.)
KTHXBAI- STAY TUNED FOR MORE~