Story: Cocknosis DxD

Ever have too much of a good thing? That was Issei right now. He felt full. Fully spiritually, full emotionally, full physically., full in ways he didn't know he could be full. This was counteracted by the fact that he had been cycling all over the place to fulfill the wishes of girls hither and yonder. The day that he could teleport, that would be a fine day indeed.

Not as fine as Koneko's butt, which he was getting a nice good feel of as she sat in his lap, but fine nonetheless. It was one of the advantages coming with the whole <i>being a devil</i> thing. This casual attitude to sexuality was not something he was used to, but he was more than enjoying it. And if anything, it was only increasing his motivation to get stronger so he could one day have his own Peerage of hot girls.

And perhaps a guy or two if they were cool. He felt that even with how much he enjoyed this... It would become difficult to keep going if the number of girls increased too much.

Little did he know, the lucky fucker.

"By the way, Koneko," he said in between deep sucking breaths. "I... meant to ask... what inspired you to ask for their bras as payment?"

To his surprise, Koneko rubbed her cheek against his and purred. Oh, right. Cat demon. "It seemed appropriate," she said.

"Um... and... was it necessary for us to have sex in front of the contracters too?"

She wiggled her butt right into his crotch. "Absolutely," she said.

Suddenly he didn't feel like arguing the point. So many weird things to learn about being a Devil. Evil Pieces, Peerages, the families, the casual attitude to sex, his Sacred Gear... then throw on top of that his supersized hypnotic cock complete with evil talking book trying to trick him into using it on unsuspecting people... He was really lucky that he managed to fall in with these Devils in that case, if his life had continued as normal he might have brainfucked the entire school inside of a day without meaning to.

It also gave him free access to two of the hottest girls in the school, Rias and Akeno... Not to mention Koneko, of course, who would be a prize worth having all by herself. And hey, turned out that Kiba wasn't half bad either, he could really see himself becoming friends with that guy after all.

Still, as he put the bicycle away, he couldn't help but worry that his physical stamina might not be up to the task. A lot of cycling coupled with a lot of sex is going to absolutely ruin anyone's energy output. Though, he did need to improve his stamina if he wanted to use his boosted Gear, especially with his hypnotic cock..

It was a dangerous weapon, but in these competitions it could be useful. And.. if he were honest the idea of having official permission to use it in a controlled environment sounded exciting. Especially if the opponent was a hot girl and he could perhaps get something out of the victory beyond the expected..

"I'm home!" he called out, letting out a yawn - but he was suddenly wide awake again when he found a pair of swords crossed at his neck.

His mind was already coming to an halt as he questioned whether this would be the end. Cut down at the height of his popularity, when he could go so far still. So much to do, so many sex positions to try out!

“Oh welcome Issei, please say hello to little Irina and her friend.” And there his mum was calling from the kitchen, the smell of fresh cooking reaching his nose.

"Irina?"

That was a name he hadn't heard in a long time. Memories hit him, of playing with a young boy his own age. Light brown hair, aggressively cheerful, kicked his butt in every sport they played... Actually, that girl on the right almost looked like she would be Irina's big sis-

"Hi Issei, it's been a while," that girl said, sheathing her sword while her friend kept it out a little bit longer. "Not so much a tomboy anymore, am I?"

Click. "You were a girl, Irina?!" he yelled. At which point she smacked him over the head hard enough to drive him to his knees. Which wasn't as hard as it might normally be, but still.

"Do these look like melons?!" Irina yelled, gesturing at her chest. "Honestly, you thought I was a boy all this time? I should tell you off for making that kind of mistake."

"Technically, you are telling him off," said the pretty blue haired girl that Issei didn't know the name of. She looked over at Koneko and... Huh, now that he thought about it, wasn't it weird they were wearing those robes? "Perhaps it would be best if we caught up in a more private setting? We have some sensitive business to discuss."

"Agreed," Koneko said, and then physically picked up Issei before anyone could say anything else, making for the stairs to carry him up to his room.

"H-Hey! Koneko! What's the big idea? You don't need to carry me like I'm some kind of ladder!"

"Issei, let the cute girl that behaves like a cat carry you like a ladder!" his mother cheerfully called up. What?! "Ah... it's so nice that he's making friends. Now. What shall I do with all of these bras that they've brought home?"

“Ahh.. please just put them away-” Issei tried to say but was interrupted by a shake from Koneko.

“They belong to Issei, we will get them later.” She said, voice as deadpan as always, made even more ridiculous with Issei struggling to escape her steel hard grip.

Oooh, great! Now he looks really bad in front of his childhood friend and her friend. Both of whom, he had to say, were really pretty! It was a shame they were covered in those robes because he had this vague idea in his head that they both had really sexy bodies, but he couldn't even grasp what kind of sexy bodies they'd have!

"So it's true then," the blue haired babe said. "I have never observed a Devil's home life before, but it is clear that you revel in filth and corruption."

"Eh?" Issei said. "Devil's home life...?"

"Oh, how could you, Issei?" Irina cutely stamped her foot, which is impressive because that robe went down to her ankles. "Becoming a Devil? Really? I knew you were always lustful, but... Show at least a little self control!"

"Issei, these two are members of the Church," Koneko whispered in his ear. "If I am not mistaken, Holy Swords?"

“Yes, we have been granted parts of the holy sword Excalibur.” Issei turned to the blue-haired girl who had started to explain. “Two unknown objects of dangerous nature have been identified as being somewhere within the city. I don’t know the exact details, but these objects could prove dangerous to everyone in the city.”

“Yes, so we are here to talk with you.. Devils about a temporary alliance to find these objects, and destroy them.”

This seemed a bit beyond Issei's level. "Uh... I'm kind of new to this, so I'm the wrong person to talk to, maybe you should be speaking to -"

"Rias Gremory," Irina said. "We know. I just wanted to check in on my old buddy and then smack him for becoming a Devil, first." She looked at Koneko. "Um... I won't do any permanent damage, I just want to smack him for being a dummy. That won't cause an incident, will it?"

"H-Hey, why are you asking -"

"Smack away," Koneko said, making a motion as though adjusting glasses that she didn't wear.

"Wait, let's talk about -"

"Stupid!"

Oh that's right Irina had a wicked right hook. He'd only ever seen her use it against bullies, but it always knocked them flying, if only for a fraction of a second. In Issei's case, he sailed up into the air, set to land on his bed.

"Now you will never know the light of the Lord, never know his grace, never ever appreciate the wonder and splendour of heaven! Your soul, forever spoiled, so that the only salvation you may have is obliteration at the hands of me or one of my peers!"

He'd landed right after she finished yelling that at him. Yeah, it was a hell of a punch.

Funny thing, though. Something had caught onto the back of his trousers. A coat hanger, wedged between the end of the bed and hooked into the back. When Irina had hit him, that hook had somehow managed to hold, and had yanked his trousers down.

Of course, he'd only realised that after the bell in his head stopped ringing, and he only realised that because Koneko had gently, yet firmly, grasped hold of his shaft and jerked it until it was nice and hard.

"While you are here, you may wish to assist us with another matter," Koneko said.

"H-Hey, Koneko! Cut that -"

"It's fine," Koneko whispered in his ear. "They are women of the Church. They will not succumb to lust so easily." She stopped to lick his balls for a moment, fuck that was so cute. Looking at them, the two of them<i> were</i> staring... But... he didn't feel like they were hypnotised. The blue haired babe was staring blankly, but she'd been pretty emotionless since she got here. Irina was blushing super hard. That... didn't seem all that different, so they were probably safe.

Why are all harem protagonists dumb? The Watsonian reason, not the Doylist: That's simply "it's funnier that way". There must be an in universe reason too, surely...

<hr>

Xenovia was a devout member of the Church, and one of its Holy Swords. One did not join this role without a certain level of faith. That faith, devotion and worship for the Father, the Son, the Holy Spirit. It was not pride that would make her say that she held more faith than most others, it was a simple hard fact. If given the choice to flee the Church or lose her own life, she would take her own life  - if there were truly no other way.

"As you can plainly see this absolutely magnificent penis has potent hypnotic properties," said Koneko, a girl that Xenovia knew was a Devil. Rias Gremory's mighty rook. A cat demon. Yet... to her mind right now, it felt like she was listening to a priest. No, a preacher. "Please study it carefully. Watch as my hand strokes up and down its considerable length."

Up and down her hand went. Slender. Around that shaft it looked like... like a little kitten wrapped around an oak tree. Mighty. Powerful. Dominant. Her breathing hitched. It wasn't lust she felt, not exactly. It was... a desire to mate. The act of reproduction itself was what she suddenly craved, not some base animalistic, fleeting pleasure.

“Its power is very strong, strong enough that even with us around to help contain it, it has gotten Issei into trouble a few times.” The girl continued, her voice sounding distant and yet close. “Fortunately, you are here and can help us with the matter.”

A penis like this would bring much power to the church. It could only be a benefit. Combine her power as a Holy Sword with that penis, and the result would be mighty to the point they could almost be called invincible. And yet... to bed a Devil... It would be heresy to engage in such an act of her own volition.

"Any girl that stares at this penis has their mind and free will melted away," Koneko said, as if sensing her hesitation. "It's so perfect that it fills your brain. It fucks you from the inside just by looking at it."

"Wh-what are you doooing?" Irina slurred. "What is this maaaagic?"

Her questions would have been a little more believable as a sign of protest if she wasn't licking her lips like a hungry dog. These words, they were even truer now that they had been spoken. It felt like a long hard dick was going in and out, filling her and pumping her brain and pussy like a toy. Making her brain feel soft and weak, so easy to mold and twist into any shape.

"Uh, Koneko, are you sure you haven't hypnotised them?"

"Holy Swords would not succumb so easily to base, lustful desires," Koneko said. "They are staring at your penis, your amazing cock, because they are trying to determine the magical source." Yes, that's right. Xenovia was staring at this perfect all commanding cock to figure that out. It wasn't that she was a barely repressed extremely thirsty girl. "Unfortunately, they will almost certainly have to have sex with you to perform a proper analysis."

"Eh?" Xenovia gasped, though it sounded muted to her own ears.

"S-Sex?" Irina squeaked, sounding similarly muted.

"Sex," Koneko said, and the word sounded in their ears like a chuch bell ringing right above them. "Since the magic is enchanting his penis, you will have to take it inside of you. Let it bottom out. Let him thrust it inside of you repeatedly."

"I'm... not sure..." Xenovia began to protest, but she wasn't quite sure how she wanted to finish that sentence.

"Imagine that my hand is your warm, soaked pussy," Koneko said, her tone suddenly more commanding. The image hit Xenovia almost against her will. "Watch as I squeeze and tease this shaft. Now imagine that it is your inner walls doing this to him." Fullness. She imagined such fullness and contentment that she never imagined was possible. "Imagine yourselves, on top of him, for hours and hours studying his cock. Getting to know it. Understanding his magic. Until his hot, addictive seed shoots inside of you, and you truly understand."

Xenovia slowly blinked, and let her robe drift off her body. She was dimly aware of Issei saying something like "Oh wow! Irina is so slender and feminine, while her friend has curves for days!"

"Her name is Xenovia," Irina said, standing next to her, similarly disrobed. "I- I suppose we should have sex with him."

"Yes," Xenovia slowly nodded. "It is clear that this is one of the two things we were sent to investigate."

"Then you should investigate it thoroughly," Koneko said, letting go of his shaft. "The childhood friend should begin, while I discuss further with Xenovia."

“Yes.. yes I should.. I did always want..” Irina moved closer to Issei and Koneko, her motions slow and almost as if she were sleepwalking. "It is for the greater good, for the glory of the church..."

"Um... Okay then?" Issei said. He sat up, but Irina pushed him back down. Pretty roughly, too.

"You lie there," Irina said. "I have to study your penis by taking it inside me."

"Sure, I guess that makes se-eeeense! Not so rough!"

It was pretty clear which of the two was in charge. Irina roughly shoved him down and kissed him, arching her back until her butt was all the way in the air. No wonder, with the size of the thing she was going to have to take inside of her. Then, she lined it up and at first gently pushed it in... but then her hips started to tremble and she suddenly went a lot faster, pushing more and more of it inside herself as she went.

As this happened Xenovia felt oddly clear headed. Like a mist was rising from her brain. It was as if the cock no longer being in sight was making her.

"Oohhhh!" Irina moaned, her entire body stiffening. She put her hands on top of her head and began to move her body lewdly, though not entirely naturally. Like she'd never actually moved her body that way before, and was swiftly learning how it worked.

"Man, I really hope you guys can work this thing out," Issei said, taking the chance to cop a feel without any hint of shame. "This thing has been causing me all sorts of stress. The last thing I want to do is accidentally use it to brainwash a bunch of girls!"

A strong pair of hands slipped under Xenovia's arms, and grabbed at her breasts right then. Koneko had her. Wait... Actually, hold on, everything about this was unnatural.

"Issei is the king of breasts," Koneko whispered. She put her cheek up against Xenovia's, using her pure strength to force her to look. Xenovia struggled - but then Irina's body moved up a bit, revealing just a hint of the base of Issei's cock. Koneko then physically dragged Xenovia around to a chair, from here she had a much better look. At the bliss on Irina's face. And at the penetration itself. "Issei is the king of breasts," Koneko whispered again.

“The king of breasts owns your tits, they exist to pleasure him. You love boobs, you love showing them off and touching them.” Koneko continued, repeating the mantra that had been taught to her by Rias and which would surely one day become gospel for all of womankind.

It suddenly dawned on Xenovia what was happening. Hypnosis! Issei had said as much himself! Somehow, her defenses against mental manipulation were being completely bypassed as if it wasn't even there!

"Issei is the king of breasts," Koneko repeated, but this time Xenovia was trying to resist that idea. She focused on the fact that she was listening to a devil, talking about another devil. No mere beast like that could control her, could command her in any way.

What did it matter that Issei was the king of breasts and that her tits were his to do with as he pleased? She was still a servant of the lord, that was where her loyalty lay.. wait.. her thoughts felt oddly confused. Did she lose track of something?

The pressure on her breasts disappeared, and Xenovia's vision snapped into focus. Irina was lying face down on Issei's bed, butt high in the air, semen dribbling out of her, and her face thoroughly lost in the land of bliss.

But this sight didn't maintain her focus whatsoever as a big dose of perfection swung its way into her direct vision.

“Alright.. Eh.. you also want to give it a once over?” Issei asked, face flushed from exertion yet clearly quite happy at the idea.

Xenovia's eyes crossed as they focused on the end of the penis - the mighty cock - pointing right at her face. The cokc of the king of breasts. The one who owned her breasts, that her tits were open for him to do as he pleased, that made her realise how much she enjoyed touching them and showing them off...

"I suppose I will have to," she said in an airy voice. What followed next could only be described as divine, heretical as such a comparison might be, to describe copulating with a devil.

1. Gonna need more detail for this part. Sex scene ahoy!
2. Later, the Holy Swords are meeting with Rias and the rest of the peerage. Akeno is fucking Irina with a strap on, while Koneko is doing the same to Xenovia. The meeting is more productive than it sounds.
3. Rias has a run-in with Asia, as Aika has brought her along.
4. Other characters wind up arriving early, sensing the impending doom of Cocknosis and Titnosis.
5. Something else