A/N: A request by kawaiicutie101! I hope I don't dissapoint you~! I've been wanting to write something related to Dark x Anti and seeing someone requested it just gave me a push to actually do it. 

A pair of black beetle eyes with neon green pupils. It was clear to Dark (well, that's what Mark named him anyways) that someone or something was inside Jack. But he couldn't really tell who's behind the Irish man.

Dark itself exists in the back of Mark's mind and he can see everything that Mark sees and knows everything that Mark thinks. This bothers Mark, a lot. The demon sometimes whispers things inside his head and even took control of his body once in a while. Of course, like any person who doesn't want to be labeled as 'insane' does, the American tries to hide the fact that there is some kind of demon inside of him, especially towards his best friend, Jack. They've been friends for years now and he doesn't want to screw it up just because of his... secrets.

After years of existing, Dark was never really interested in other demons. Even though some of the reason that he was born was because of the lust, dirty thoughts, and secrets Mark has, its almost impossible for him to fall in love. None of the demons that he saw in other people's mind intrigues him. But now, after seeing whoever it is that was on the back of Jack's mind, he couldn't stop thinking about it.

He wants... no, he needs to see whoever this demon is fully and talk to them.

As usual, Mark invited Jack to come and play some video games. Being the Jack that he is, he couldn't resist and quickly hopped into his car and drove towards Mark's house. They did a little chitchat and just like that, they started to play some video games that Mark has just bought recently on the couch of his living room.

As they played along and laughed at things, Dark became impatient. Just thinking about the other demon that he never met drives him crazy to the point where he couldn't take it anymore. He needs to get out, now.

"Jack, you really suck at this game!" Mark laughed at his friend who keeps on losing. Mark already won for 5 times while Jack only won for 1 time. "It's my first time playing this shit Mark! Cut some slack, would ya?" Jack replied, pouting in annoyance.

"Whatever you say Ja—" Mark suddenly grunts as both of his hand lets go of the controller and held his head that was shaking. It was obvious that he was struggling to fight something.

Jack quickly put his controller down, grabbing Marks shoulder. His eyes were filled with worriedness. "Oh god Mark, are you okay?"

"Y-Yes, I'm fine—" "C'mon Mark, let me out... its been a while~ I want to play some 'games' too.." Dark purred inside his head, only to be responded by a loud, angry "NO!" from Mark.

Jack jumped a little, obviously was shocked by the loud voice. His vision was now mixed with fear but he still wants to help his best friend, no matter how terrifying it is for him. "Let's get you some rest... okay?" The Irish man offers, only to be responded with silence. He stopped moving like before but his head was still looking down, but he could notice that he was now smirking sinisterly, and his skin was slowly turning into a paler color.

"But I don't want that, not at all." He answered with a deep, almost growling voice. Jack quickly took his hand away as he stood up, knowing that something is not right.

That's not his best friend.

"Who are you...? What have you done to Mark?" Jack managed to let out his voice sternly, despite his brain chanting him to run away.

The man lifted his head slowly, opening his eyelids. His eyes were as black as a raven while his pupils were red like his hair. "Oh, but I am Mark dear... well, that's not exactly my name." He paused as he chuckles softly. "I prefer to be called Dark. That's what Mark named me anyways~"

"Dark like in his videos...? I thought it was only a character that he created..." Jack thought inside his mind, eyes still locked on the figure in fear.

"Yes dear, I'm real~" The demon quickly answered, delighted by Jack's frantic reaction that doesn't know he could read other people's mind. "We should stop playing this silly little game honey... Let whatever demon inside of you out, now."

The green haired man took another step back, obviously a bit surprised that he knows that particular secret that he tries to hide so much. "No... I won't let him out." He spoke softly, as his hand slowly trying to grab the doorknob so he could run away.

"Hm?" Dark hummed, quickly noticed what Jack is trying to do. Smirking, he quickly grabs Jack and pinned him to the wall. "Are you seriously trying to run away from me? How cute~ I guess that's why Mark has fallen for you." He purred into Jack's ear, making Jack blushed. He stopped squirming for a while, still trying to process what the demon just said.

"W-Wait... Mark actually likes me...?" He asked, both of his cheeks blushing madly while his heart has picked up some speed, making his chest hurt just a little.

"My My..." Dark shook his head slowly. "Both of you are that naïve, huh?" He chuckles lightly. "But Jack, I still need my demon out~"

Quickly snapping back into reality, Jack starts to move again. "Let me go ya demon! Anti is staying inside and he's never coming out!" Jack shouted, moving side-to-side trying to free himself from the demon's strong grasp.

"So, his name is Anti huh? What a lovely name..." He grinned, amused by how desperate Jack was struggling to get off of him with his little, fragile body.

"Anti, I know you can hear me and I know you can let yourself out now. But I guess being a teasing bastard that you are, you're leaving me no choice..." He starts to speak on a different language; it seems that Mark was chanting some sort of spell.

Jack on the other hand starts to feel that his head was getting heavier and everything was spinning. "Shit... he's coming back." And in that point, the pain was getting more and more unbearable. Jack shouted in agony, trying to keep the demon inside; but, he was too weak for this.

Jack stopped squirming, head looking down. Dark smirked, knowing that what he wants was finally in front of him. His hands then let go of the body, as it stood up on its own. "Really, ya need to use that spell? It stings y'know?" The man answered, lifting his head. Dark beetle eyes with green pupils. Yup, this is what Dark has waited for quite some time.

"Well, I have no choice because you're being such a fucking tease." Dark growled, pulling Anti into a long, needy kiss. The other demon quickly kissed back, knowing that deep inside, he wants him too.

"Shit Dark, you really want me this bad huh?" Anti managed to say between their kiss that became heavier as time goes on.

"You have no fucking idea." Dark murmured, trailing kisses onto Anti's pale neck, making the other moan quietly.

"And I bet you want me too."

A/N: I'm sorry if Dark and Anti's relationship is kinda rushed? I mean, they are created by lust and other things so yeah ;P And I think I'll write more than 3 for the requests. Your ideas are way too interesting for me to not write. 

If you haven't requested yet, you still can by going to the chapter before this one, I'm still picking for the next one!