Deadly obsession
By: lynnx_oo
Summary:
Yandere Yjh who will kill anyone that dares to flirt and touch Kdj without hesitation and psycho Kdj who will reward Yjh with a kiss on the lips once he is done.

Kdj could never get enough of the sight of Yjh going crazy for him, hurting anyone that might want to steal Kdj away from him.

or

Yjh falls in love with dancer Kdj and becomes his loyal pet.

===============================

Work Text:
"Is this your first time here, cutie?” A young woman in a tight-fitting, black dress questioned him from the side.

She was obviously drunk already and smeared red lip gloss was sticking onto her partner’s clothes.

She didn’t seem like the type to hold back.

“Yes.” Yjh answered truthfully.

Yjh sat in the city’s most popular club.

He never had been to a club before in his life, everything was too loud and flashy for him.

But a coworker noticed how down Yjh had been feeling lately and promised him that this club would lighten up his mood.

Yjh wasn’t really convinced but was also not opposed to the idea.

Maybe trying out something new will make him forget about the person that was behind all his distress.

His first crush.

Yjh had been in love with him since they went to college together.

They were best friends and Yjh finally decided to take all his courage to confess.

But he was cruelly rejected which led to one thing or another with the guy’s head ending up in a dumpster.

Accidents happen right?

Yjh knew he never had a chance to be in a happy relationship with him but rejecting him like that wasn’t necessary.

He didn’t want to hear how disgusting it is to like another guy.

What does love have to do with gender?

Why does everyone make a big deal out of it?

Yjh couldn’t understand but he wanted to make him go through the same pain that Yjh felt when his heart got crushed.

Maybe he kind of went overboard when Yjh cut off his head.

But that wasn’t important now.

It was already in the past.

“Oh really? That’s good then you can see how good our dancer here is.” The woman pulled Yjh out of his thoughts.

“Dancer?” Yjh got curious, he had only heard of the famous dancer in this club but had never seen him in person.

“Yeah, he’s the best in the industry. You will love him, trust me.” She said and winked at him.

Now Yjh’s attention shifted to the big stage in the middle of the room.

Behind the curtains, Kdj got ready for his weekly performance.

This time he decided to wear a simple black dress with shining rhinestones.

He danced to make some money on the side and because he loved the attention.

The audience adored him, everyone held their breaths once he set a foot on stage.

They followed his moves as if he cast a spell upon them that can’t make them look away.

As his body moves, Kdj loses himself in the music around him and forgets everything around him.

As Yjh watched the whole thing, he fell in love with Kdj at first sight.

The way he moved so elegant yet sexy at the same time took away his breath and he couldn’t stop looking at Kdj.

Yjh had never seen someone as beautiful as Kdj in his whole life.

It was like fate.

At least that’s how it was for Yjh.

Meanwhile, Kdj had other worries to think about.

Dancing did make him happy, but it also had its downsides.

Aside from normal fans who would send him love letters and small gifts, he also attracted people who wanted more than just to watch from a safe distance.

Occasionally, he had to deal with admirers who wouldn’t leave him alone and would constantly try to get his number.

So, he decided to play with them a little for fun and to get free drinks out of it while he was at it before throwing them away.

It was always amusing to see their faces blow up with anger when they realized that Kdj was just messing with them and that he wasn’t actually interested in going to a hotel to fuck with them.

Then he lets the security handle the rest.

It had become a normal way of passing time for him.

Life just had become a little too boring lately.

“Hah… ah…hah” he in-and exhaled quickly.

Finally, another show was over.

While he breathlessly enjoyed bathing in the spotlight, the sound of his heart beating out of his chest and the cheering audience filled him with a sense of satisfaction.

He left the stage and dried his sweat off his face with a towel.

Shortly after it was over his fans were already waiting for him.

Usually, he was not the type of person to care about fanservice, but it was good for the club’s image.

Kdj exchanged a few pleasantries and was ready to take a break in the staff room when his attention was caught by a tall and handsome guy standing in the corner of the room.

Kdj had been feeling his eyes on him the whole time he was talking.

Kdj took pity on him because he looked like a lost child, it was definitely his first time in a place like this. It was always fun to tease newbies.

So, he decided to talk to him first.

“Hey, you have been staring at me for a long time now, is there something wrong?” Kdj innocently asked him while putting up a fake smile.

Yjh reacted surprised and started blushing a little. It was embarrassing to be called out like this.

The whole time he wanted to talk to Kdj, but he didn’t know what to say.

“No, I just really liked your performance. I think you’re beautiful. Um… could I get to know you better?”

Kdj did consider it for a second because of his good looks but quickly dismissed the thought as soon as it came.

Judging by Yjh’s clumsy attempts at flirting, he had no idea what the weight of his words meant and Kdj wasn’t interested in teaching a virgin how to have gay sex.

When it came down to that he preferred those with experience, so he wouldn’t have to worry about scaring them off with his kinks.

Although rumors say about him that he is a dirty bottom slut who does it with anyone who asks, however that couldn’t have been further away from the truth.

He truly is a bottom, but he was picky about choosing his sex partners and he liked to dominate instead of being dominated.

Up until now he never found someone who was down for it, and he expected it to be the same with this guy.

“Thank you for the compliment, but meeting with fans is off the rules you know.”

Yjh made a dejected expression, said that he understood, and apologized for the sudden question.

But he wasn’t even thinking about giving up and started stalking Kdj ever since they talked for the first time.

From that day onward Yjh followed Kdj everywhere.

It took Yjh some time but he found out where Kdj lives, what he does in his daily life, and who he meets up with. The things Kdj likes and dislikes and much more for Yjh to become his ideal type.

While he stalked him, he observed Kdj’s typical behavior of chewing out guys that tried to hit on him.

Usually, they leave once Kdj made it clear that he doesn’t want to give out his number or sleep with them but this time a guy didn’t get the hint.

He had been pestering Kdj for the whole night and tried everything to make Kdj give in to him, even going as far as touching him without consent.

Kdj’s nerves were being tested in a way they never have been before, and he was this close to actually landing a punch in that scumbag’s face.

But that would only attract negative attention to him, so he tried to sit through it.

To his delight a staff member called him to take out the trash, the perfect opportunity to get away from him.

“Sorry, my coworker needs me, bye.” He said and left.

But unbeknown to Kdj the guy secretly followed him to the exit behind the club along with Yjh who had been watching the two for the whole night.

Faintly Kdj could make out rustling noises but didn’t think much of it before it happened.

Suddenly he felt someone gripping his hands, pinning them against the wall, his face facing the concrete.

The adrenaline rushed through his blood and sharpened his senses. Kdj tried to shake the attacker off but, he didn’t butch and pressed even more of his weight onto Kdj.

Kdj had already had a bad feeling and it got only worse when he heard the sound of a belt being unbuckled.

Before he could even react, the man rubbed his hard length against Kdj which made him feel sick to his stomach.

“Finally, you’re mine. I guess you’re the type that likes playing hard to get and then getting raped in a dark alleyway.”

“Stop-“

Just as Kdj was about to protest, the man behind him slumped to the ground.

Confused, Kdj turned around to see him bleeding to death with his throat slit open.
Kdj watched him motionless while the guy was making horrifying noises that could have been straight out of a horror movie.

When Kdj looked up he saw the handsome visitor from a few weeks ago with a bloody knife in his hand.

Now he got an idea of what was going on.

Yjh felt incredibly relieved that he saved Kdj just in time.

Although that feeling didn’t last for long because he realized what he just had done and froze on the spot.

He became really anxious and worried that he would be hated now and that he would have to kill Kdj now too or the cops would be here any second.

He was about to say something when Kdj started laughing happily.

Yjh was caught off guard because didn’t expect that reaction at all.

He thought that everyone who sees a murderer would throw insults at him and run away in fear.

Well, that’s the normal reaction, right? But Kdj wasn’t normal.

He too had committed crimes in the past that he would rather not remember.

Kdj didn’t really care about what Yjh did, he was actually quite pleased that the annoying guy finally shut his mouth and would never open his eyes again.

On top of that Kdj was tired of listening to all the complaining about his love life and bragging about money and expensive clothes Kdj would get once they became a couple.

Kdj wasn’t interested in money or love.

He wanted the thrill and Yjh could give him that.

“Why are still standing there?” Kdj asked him after the guy stopped breathing.

“What? Are you not scared of me?” Yjh asked in return.

“Scared? Hahaha, that was a good one, come on stop spacing out. We need to clean this up before someone else sees it. We don’t need the police involved.”

Then Kdj helped Yjh erase the evidence of this ever taking place.

They hid the body and washed off all the remaining blood that was sticking to Yjh.

They were lucky that the guy didn’t have any remaining family or friends that would look for him or question his sudden absence.

While they were at it Yjh fell even harder for Kdj because he didn’t judge him at all and fully accepted Yjh like no one ever did before.

Once they were done Kdj asked Yjh to bend down a little.

“Why?” Yjh asked confused.

“Just do it.”

Yjh did as he was told and then Kdj patted Yjh on the head and praised him for saving him earlier.

“You did such a good job.”

That made Yjh blush all the way up to his ears and then Kdj remembered that this guy told him that he was into him.

Kdj had been bored for a while now and Yjh could change that. He just had to play with him.

“Do you want to be my pet?”

“Your pet?”

“Yeah, my pet. Don’t you want to be treated like a good boy?”

Yjh nodded.

“Good then come here on your knees.”

Yjh crawled on all fours to him, Kdj praised him again and smiled at him.

It was so pretty it was almost blinding for Yjh. He wanted to see it again, so he thought that maybe being a dog for Kdj wasn’t so bad.

---

That’s how their unique relationship started out.

Maybe killing was not the typical way of getting closer to someone but Yjh was desperate enough to use anything to make Kdj look his way.

He was in love already so what use did it have to tiptoe around it?

Kdj probably wouldn’t even care if he confessed right now, he was only his dog.

So, he decided to be patient and do everything that Kdj wanted of him.

They fall into a routine where Kdj lets guys flirt with him until he allows Yjh to kill them for him.

Kdj had so much fun watching Yjh waiting patiently for his sign to bite.

As if he was a real dog Yjh was taught nonverbal signs to pick up on what Kdj wanted of him.

That turned out to be pretty useful in a lot of different situations.

And after Yjh was done slaughtering the men who dared to touch and flirt with Kdj, he was rewarded with a kiss on the lips from Kdj.

It made Yjh feel like he was floating on cloud nine and left him hoping for more.

It wasn’t unexpected that after a while a kiss wasn’t enough to satisfy him any longer.

Yjh wanted to feel Kdj’s touch on his skin, hold him tight and devour him completely.

Kdj noticed that his puppy got hornier with every passing day and was nearing his limit, but he wasn’t going to make the first move.

He liked to make guys beg to sleep with him after all.

And then the inevitable happened.

Yjh got hard after they kissed.

He was super embarrassed and his whole face turned red as he awkwardly tried to hide his erection in front of Kdj.

Kdj couldn’t hide his excitement and his lips formed into a smirk.

Maybe his dog needed a little help.

As Kdj stepped closer to him, Yjh’s heart started beating faster.

Yjh held his breath in anticipation.

“If you want me to help you with that you need to start begging.”

Kdj ordered after rubbing Yjh’s bulge a little with his hand.

“Please help me. Please, I want to thrust deep it inside you.” Yjh begged while panting heavily.

“Yes, like that. If you want to be inside me, you better do everything I say.”

Yjh nodded eagerly.

“Good boy.”

Every praise coming from Kdj made Yjh’s dick twitch and his mind spin.

“Then follow me quietly.” Kdj said and went back inside the club.

Kdj didn’t want to risk getting caught by a stranger, fucking in a dark and cold alleyway.

As a popular dancer in the club, he gets to have some benefits for example his own private room where he can do what he wants.

Usually, it was used for one-night stands when he found the right partner.

And this time it was no different aside from Kdj planning to use the room with Yjh more than just once.

After he let Yjh inside, Kdj ordered him to strip and get on his knees.

While Yjh was doing that, Kdj grabbed the dog ears with black fur he once got as a gift and put them on Yjh’s head.

“Perfect, now you even look like a dog.” Kdj said pleased after he finished taking a good look at Yjh.

But just as Yjh was about to touch them Kdj stopped him.

“Uh-uh no taking off, you need to wear them until we’re done.” Kdj warned him.

Then Kdj took off his clothes in an alluring way and laid down on the edge of the king-sized bed that was placed in the middle of the room.

As he was laying there he spread his legs to show off his pretty pink-colored hole.

The sight alone made Yjh’s mouth water.

“You better listen to every word I say or we stop this immediately. Do you understand?”

“Yes, I understand.”

“Very well, then you can lick and prepare my hole, but you’re not allowed to use your hands.”

Yjh crawled to the bed and stopped once his face was near enough to stick out his tongue.

He had never done something as lewd as this before.

It made him nervous, but he couldn’t stop now after Kdj finally allowed him to touch him.

After a few licks and spreading his saliva all over it, he put his tongue inside and began thrusting.

And Kdj let out the prettiest moans he had ever heard once he reached deep enough.

It turned him on so much that his dick started to hurt.

Based on Kdj’s uneven breathing Yjh found out where he liked it the most.

Yjh was so into it he forgot everything around him.

Only Kdj’s grip on his hair brought him back and made him look up for a second.

“You’re like a dog in heat. You can’t wait to fuck me, right?” Kdj teased him with a playful smile on his face.

Seeing Kdj’s flushed cheeks and open mouth made Yjh want to kiss him.

“Yes, please let me fuck you… I can wait anymore.” He begged.

Yjh’s hair was already a mess and hanging over his eyes.

“Aww, my little puppy is so adorable when he whines like that.” Kdj said and chuckled.

Yjh was done being teased so he stood up and started rubbing his hard length against Kdj’s ass.

“Don’t get impatient now or you can get off alone.” Kdj reminded him.

Yjh made a guilty expression and apologized.

Then Kdj took a condom out of the drawer of the bed table and put it over Yjh’s dick.

“You can put it in now.”

Yjh didn’t need to hear that twice and almost came on the spot when he felt Kdj’s warm insides welcome him.

It was even better than he could have ever imagined.

He started out slowly but soon enough pounded into Kdj hard and quickly.

“Ah- ah ngh...ah” Kdj’s moans were getting louder and louder.

“Kim Dokja…. Kim Dokja” Yjh couldn’t stop repeating his name.

“Ah uh ah- Dogs d-don’t talk.” Kdj scolded him.

“Woof, woof!” Yjh started to bark in response.

“Yeah, just like that, good boy.”

Yjh’s grew bigger at the praise.

He wanted to obey, to please Kdj even more and to become spoiled by him.

Without a doubt, Yjh would do everything for Kdj.

“Ah- not e-enough ngh...t-touch my chest.” Kdj demanded.

Of course, Yjh listened well and started pinching Kdj’s chest with his fingers.

Kdj tightened up at that and soon they were both cumming together.

Yjh held Kdj closer and enjoyed Kdj’s body heat as they were coming down from their climax.

After that, they went for a few more rounds until Kdj was too exhausted to continue.

But it still was the best sex Kdj ever had.

Yjh’s stamina in bed was really something admirable.

“Ah… I’m too tired, can you wipe me down Yoo Joonhyuk?” Kdj mumbled into his pillow.

“Yes.”

After Yjh was done cleaning Kdj and himself, he laid down next to Kdj.

Kdj turned around to face Yjh and sleepily started ruffling his hair.

“You were so good today, it felt great.” Kdj praised Yjh again.

Kdj already noticed how much Yjh likes to be praised so he couldn’t stop himself from doing it again.

Yjh got overwhelmed by his feelings for Kdj and hugged him.

Usually, Kdj wasn’t the type to get romantic when it came to aftercare but this time it felt good to be wrapped in Yjh’s arms.

It was peaceful.

Maybe he missed this.

The feeling of being close to someone like this outside of having sex.

Though he didn’t want to think about it too deeply.

It didn’t take long for him and Yjh to fall asleep like this.

---

After they had done it once it felt like a switch inside of Yjh had been turned on.

He had been clingy and obsessed with Kdj from the start but now it was even worse than before.

Kdj loved his puppy, he really did but sometimes it was even too much for him.

It looked like Yjh would bark at anyone who came near Kdj and that Yjh wanted to claim Kdj all to himself.

Of course, that was not what Kdj wanted at all.

He was always someone who preferred the no strings attached policy when it came to sex.

And he thought that Yjh would know this better than anyone, especially since Kdj had told him from the start that he was only his pet.

Maybe it was wrong of him to let Yjh become closer and more attached to him.

But up until now, he had never had someone in bed who was as submissive as Yjh.

It would be truly a shame if Kdj had to give up on him.

So, he decided to have a serious talk with Yjh if this continued for longer.

But before he could do that Yjh disobeyed Kdj’s rules.

It started out as a typical shift at the nightclub.

He did his usual dance performance and was ready to take a break when someone tried to flirt with him again.

The guy ticked off all of Kdj’s boxes and had a lot of money that he wasn’t afraid of showing off.

Kdj only had to act all cutesy and helpless and soon the guy was ready to spend all his money on him.

Kdj really hit the jackpot, the guys that usually hit on him only pretended to have a lot of cash to brag but this time was different.

But before Kdj could have fun with spending someone else’s money on himself, Yjh meddled in his business.

He had the audacity to tell the guy to “fuck off because he is already together with Kim Dokja.”

Kdj almost wanted to cry because of the embarrassment.

It turned out to be even worse than what Kdj was afraid of happening.

Yjh really thought they were in a relationship because they slept together once.

Kdj was beyond mad because he wanted to let this stupid guy spoil him.

And now he could forget about that, and it was all Yjh’s fault.

“NO- ehm… he’s just lying, don’t listen to him alright? Wait for me, I need to have a heart-to-heart talk with this man.”

Kdj said while putting on his fake smile and then quickly disappeared with Yjh into his room.

Seems like his dog needed to be reminded who his owner is.

Once Kdj closed the door behind himself, his personality changed from friendly to cruel.

“Take your clothes off and sit on the floor.”

“But-“ Yjh wanted to defend himself, he didn’t do anything wrong.

“What? You want to disobey again?”

“No.”

“Then you better keep your mouth shut.” Kdj said in a cold tone.

It was time for punishment.

That meant Yjh had to wear handcuffs so he couldn’t move or use his hands.

He also had to wear the dog ears again as well as a leash with a collar around his neck.

And he was only allowed to take whatever Kdj decided to give him.

Kdj stepped on his cock and as soon as Yjh was hard, Kdj made fun of him.

“You can even get hard in a situation like this huh… pathetic.”

“That’s because-“

“Didn’t I say you should not talk back to me?” Kdj asked after pressing more weight onto Yjh’s dick.

“Ngh… I’m sorry.” Yjh moaned.

“That’s more like it.”

After he said that, Kdj put on a cock ring on Yjh’s dick, he didn’t want Yjh to feel any pleasure from this.

Then Kdj took off his own clothes and started touching himself on his bed, but this time Yjh was only allowed to watch, not touch.

Kdj played with his nipples and after that he sucked on his fingers to make them wet enough to thrust them inside his hole.

When his hole was loose enough for two fingers to fit inside, he started touching his cock with his other hand.

He made sure that Yjh could see everything and moaned extra loud for Yjh’s ears to listen to.

Suddenly the floor seemed colder and kind of cruel to Yjh.

It wasn’t anything like the last time he sat there and watched Kdj.

Was what he did really so wrong that he deserved this?

He wanted to know but didn’t want to ask and upset Kdj any further.

Kdj continued having fun with himself and coming multiple times until Yjh turned into a whiny and needy mess.

Yjh’s pitiful untouched dick was twitching and already oozing precum at the tip.

It looked like it begged Kdj to touch it.

But Kdj wasn’t even thinking about giving Yjh any kind of release.

“I’m s-sorry ah..ha..p-please f-forgive me.” Yjh repeatedly apologized.

And Kdj enjoyed every second of it, especially the look on Yjh’s face when he was too aroused to speak correctly.

Kdj continued to humiliate him and say stuff like:

“What gave you the idea that we are together?”

“You are my dog, nothing more, don’t get so cocky!”

“Dogs that don’t follow their owner are nothing but dirty mutts”

“And dirty mutts are not allowed to touch me.”

Yjh started crying when he was forced to listen to all that and felt ashamed but at the same time was more turned on than ever.

His tears were already rolling down his face as he kept looking down at the floor, he felt too guilty to look at Kdj anymore.

And after Kdj humiliated Yjh to his heart’s content, he got off the bed and picked up the leash that was connected to Yjh’s collar.

He harshly pulled on it to make Yjh look into his eyes. He loved to see his pet cry.

“Lay down.”

When Yjh did as he was told, Kdj dropped his body and sat down right on his dick.

Kdj rode him until he was satisfied with torturing Yjh.

“P-please let me c-cum… please…” Yjh couldn’t stop begging for it.

His face was a mess, filled with tears and drool hanging from his mouth.

It seemed like Yjh was nearing his limit and Kdj was also almost done for the night.

Soon he came and then got off to take off the cock ring that was still bothering Yjh.

Once it was gone Yjh came all over himself.

That was the most powerful orgasm Yjh had ever had.

But he almost passed out from exhaustion.

“Aww, are you that tired Yoo Joonhyuk?” Kdj smiled at him.

“Mhm… I’m sorry Kim Dokja…“

“Are you still feeling bad about it? If you keep in mind who your owner is, everything is fine.”

Yjh nodded and closed his eyes, relief filled him.

If he was being honest, he was a little scared that Kdj was still angry at him.

“Come on let’s clean you up and get you into bed or you’ll catch a cold.”

Afterwards Kdj who was sitting on his bed again, allowed Yjh to lay on his lap.

Of course, Yjh didn’t deny his offer.

His head was right between Kdj’s thighs and he almost thought he was dreaming when he felt Kdj pat his head gently.

“I love you so much Kim Dokja.” He sniffed with tears building up in his eyes.

Yjh loved him so much he couldn’t hold it in anymore.

“I know, my puppy loves me very much.” Kdj said and kissed Yjh’s cheek.

“I will always take care of my adorable pet.” Kdj promised to Yjh.