Disclaimer: I do not own Highschool DxD and Overlord (2012). They belong to their respective owners.

Enjoy.

Issei Hyoudou...

He is known by many things...

And an unrepentant pervert, on that no one can agree...

And he dreamed of wanting to being a harem king because, well, why can't he? It is every warm-blooded male's wet dream of gaining a lot of girls that shall fall to his heel of affection and the pleasure that comes with it...

But deep inside, he knows he doesn't have a chance to get the girl. Cause seriously, who would want to be attracted to someone like him, anyway...

So, it does comes across as a surprise when Issei has been met by a girl named Yuuma who requested him to go on a date...

And to say that he is shocked is an understatement as even he couldn't believe his luck that a girl would notice him and requested him to go on a date...

But they did and Issei, in all their remaining time together, are having the time of their life as Issei is basically his first girlfriend with the respect she deserves...

Because a pervert he maybe, he must also make his love life perfect with nothing to ruin such a wholesome moment in his entirety...

And as he and Yuuma were then walking into a park in the middle of the night, she requested Issei to lend him his ear as Issei presumed that it'll be surprisingly happy for him...

Instead, all he can hear is...

"Would you die for me?"

Issei thought that he has trouble hearing what Yuuma had just said and tell her to clarify what she said...

Instead, something weird happened as she suddenly black wings from her back and then, she suddenly wears the most revealing black clothing, consisting of straps that makes him see the greatest joy of a girl naked ever and all Issei can think of is...

Is...

Is...

...

...

He doesn't exactly know how to say this but...

Did someone just cosplay as an edgy version of Kamen Rider?

"YUUMA!"

Issei yelled out the name of someone as he pant hard while finding himself lying in the same park that he and Yuuma is standing at, "W-what... Where... am... I?"

"Hey, you okay?"

Issei heard someone's voice to see someone is standing beside him.

He appears to be someone that is almost the same age as him with short black and his outfit being normal and casual that is consisting of a white collar shirt with some sort of dark grey vest upon it with the inside being a black shirt of sort while also wearing black pants as well.

And this young man is looking at him in concern, "Hey, can you hear me?"

"What?" Issei said in an incredulous tone before shaking his head and said, "I mean, yeah, I guess. I... I... don't know... I..." Issei tried to strained himself before saying, "Why... Why can't I remember... something?"

"Hey..." The young man called out to Issei, "You need anything? Any help to go to the nearest hospital? Cause, if you're having amnesia, you really need some serious help."

"I'm fine, I'm fine..." Issei said in assurance to him, "I can remember my name, my parents, where I live, where I go to school to and..." Then Issei gets a startling realization, "Oh no... YUUMA!"

"Who?" The young man said in confusion while tilting his head.

"Yuuma! She's my girlfriend! We were just standing and she just said something in my ear and... and..." Issei tried to continue yet, unfortunately, he couldn't even if he tried.

"Woah, woah, settle down..." The young man said, trying to calm him down, "What are you talking about?"

"My girlfriend, okay? She... She got to be here... and probably close by and... something happened and..." Issei tried to remember and once again, it failed to give him anything to remember.

"Okay, look..." The young man said to him, "I don't know if you noticed but I found you lying on the ground. There is no Yuuma with you. Just you... right here... all alone, for some reason... that's it..." The young man said as he slowly explained it all to him.

"So... is everything I remember... all just some... some dream or something... Is it!?" Issei yelled out in frustration at the young man who seemed shocked at his outburst which made feel bad about it as he said, "I'm sorry... I'm sorry... I..." He then looked down sadly and said, "I thought I finally found a love of my life... who knew that it was all a lie..."

Then he felt something grabbed his shoulder as he gives an assuring smile and said, "Hey, listen... I don't know what is your major problem but don't be sad... there's probably more fish in the pond here and... well, maybe if you would, I don't know, act less like something a girl would hate, then maybe you probably have a chance... maybe..."

Issei just lightly scoffed, "Yeah, I doubt it..." Issei then looked at the young man as he gives a hand, "Thanks, by the way. Could have woken up without you... uh..."

"Ahriman. Call me, Ahriman..." The young man, Ahriman, introduced himself as he shakes his hand to Issei.

"Thanks, Ahriman-san..." Issei then walked away as he waved at him, "See ya. Don't want to get my parents mad, right?"

"Yeah, you shouldn't?" Ahriman said as he too walked away and as Issei is basically out of sight, he then looked at his hand as he smiled before something appeared on his hand.

It appears to be a gauntlet of sort, red metal in colour, tipped with claws and a green gem from where the palm is while some sort of glowing green runes appeared on the gauntlet itself.

Ahriman then started to tapped on the gem of the gauntlet as he said, "Wake up there. I don't know if the extraction would have awakened you but you gotta say something and be grateful that your host isn't some pervert or whatever..." Once again, no response, making Ahriman frown and said, "Seriously, nothing?"

"I refuse to talk to your kind, demon." A loud, booming voice is heard as Ahriman chuckled in amusement.

"Technically, you are talking to me. Which defeats the purpose of you not wanting to talk to me which also means that-"

"DON'T PLAY GAMES WITH ME..." The gauntlet said out loud, "WHY ARE YOU HERE!? HOW ARE YOU HERE!? HOW DID YOU ESCAPE FROM YOUR IMPRISONMENT!? GOD SHOULD HAVE BEEN VERY THOROUGH WITH HIS IMPRISONMENT UPON YOU AND MONSTROUS KIND!"

"Seriously, you don't need to yell. I'm still here..." Ahriman said, finding irritation in him yelling, "And first of all, you need to tell me that you know my kind?" He said, sounding curious.

The gauntlet just scoff and said, "Know you!? Your kind are the absolute worst!? The pinnacle of soulless evil and brutality like no other! And with what you're kind had done, I don't blame the devils for swallowing their pride just to send you to the pits of Hell where you deserved."

"Geez, I can seriously feel the rage from that..." Ahriman said in a sarcastic manner, "Listen, I think we gone off the wrong foot here. Why don't we do an introduction? Here, let me start..." Ahriman started to clear his throat as he introduced himself, "I am Angra 'Ahriman' Mainyu, you're new host. And you are, my weapon of mass destruction?"

No response, making Ahriman frown again, "Seriously, nothing?"

"You should know who I am, considering I know why you stole my former host's Sacred Gear for your making. And don't forget that I didn't hear what you think, Ahriman. Or should I say-AHHHH!?"

Ahriman quickly grabbed the gauntlet and burned it, making the dragon feel the pain as Ahriman looked upon in an expression of absolute rage and anger, "Watch it, Ddraig? Or I'll tear your soul apart and feed you to my dogs if I have to."

"YOU DON'T EVEN HAVE DOGS!" Ddraig called that out to him.

"I'LL GET ONE WHEN I'M STILL HERE!" Ahriman called back to him before releasing his hold on the gauntlet before taking a deep breath, "So, you know who I am?"

"Yes, I do." Ddraig bluntly stated.

"And... Uh... You're not... You know... Not having an existential crisis or something..." Ahriman said, sounding worried about Ddraig.

"Hah! Me? Having an existential crisis? Please... As if the mighty dragon like me would be so moody by such feeble revelation... I'm offended that you would even think so little of me..." Ddraig said in an offended and proud tone at that.

"Then, you know that I'm not like those demons you know. I mean, you know who I am and what I really am? So, what are you fussing about, anyway?" Ahriman questioned the dragon.

"Bah, such excuses. A demon is still a demon. Primordial beings of chaos, evil and disorder who only care about their own and that's it and you, Ahriman..." Ddraig called his name so loosely, "Are no different. In fact, you're understanding of human morality just makes you even more dangerous because you can effortlessly hide what you truly are are as an abomination of evil while everyone is unaware of the demonic entity they're near at..."

'Wow, someone's biased...' Ahriman thought with a shrug.

"I HEARD THAT!" Ddraig yelled out, "And don't expect you to be any different than my previous host. You're just as much of a pervert as Issei is and that's something."

"Please..." Ahriman said while rolling his eyes, "Don't compare me to him. At least, I'm not some breast loving loser."

"You actually are. You're even planning on something to do with those Devils at Kuoh Academy. In fact, why am I seeing lots of your images of the Gremory heiress and her Queen with their skirts up and showing their panties on their backside?" Ddraig said, even sounding really cringe.

"Meh, can't help it that they're hot..." Ahriman shrugged without any shame, whatsoever, "Okay, look, Ddraig. As much as you're being a racist asshole..."

"It's not racism when it is justified." Ddraig defend himself.

"Spoken like a true racist..." Ahriman called him out, "But just face the facts, Ddraig. You are now my dragon and I am your new host. And if you saw and read through my mind, know that I'm not some 'cliche generic evil bad guy' or whatever..." Ahriman said, empathizing his two fingers at length, "I'm not going to cause any trouble here. Just me wanting to have fun, maybe do some mischief on the girls and..." Ahriman smiled as he said, "Maybe get a harem as well, right?"

"Ugh... And you prove my point on how you're no different than Issei..." Ddraig said, sounding disappointed until he said, "Fine, so you're not like your kin. Just so you know that I only accept and tolerate you because you are the lesser of two evils. That's... It..." Ddraig said in finality.

"Sure, whatever..." Ahriman shrugged, "Now, why don't you just relax into my own Pocket Dimension and maybe mingle with the rest of my familiars, okay?"

"Oh, yes. Let me 'mingle' with a giant planet-sized eldritch abomination that knows only to eat planets? That will be such a swell idea. And while I'm at it, why don't I have a rematch with this prick because HE CHEATED!" Ddraig said in a sarcastic manner before yelling in complaints at who just made him submit.

"Oh good. Thank you for accepting. Now, good bye..." Ahriman said as then let the Boosted Gear in his hand disappear as he then sigh, "Great. Hope getting the Boosted Gear from Issei would be worth it. Who knew what an absolute pain it is..."

Ahriman then looked into the bright as he smiled and said, "So, of all the worlds that I woke up in, maybe in some generic fantasy land for an Isekai plot point or something and all I get is fucking Highschool DxD..." Ahriman started to laugh, as if he had just heard the funniest joke ever, "Hahahahaha... Can't believe my fucking luck..."

Ahriman still laughs as he remembers how did it all go...

Raynare didn't know what had happened...

Issei didn't know what had happened...

Both of them didn't know what had happened...

And yet, no matter how much they try to deny it, Issei saw Yuuma, or in reality's name, Raynare, suddenly gets punched in the face by someone wearing black armour that, to Issei's perspective, looks like someone had made an edgier version of a Kamen Rider cosplay with the spikes, the wings and all as the Black Knight...

Yes, that is what he is called...

Just punched Raynare so hard that the Fallen Angel is then thrown towards a tree that it made the tree break from the very impact itself...

"W-what..." Issei couldn't help but ask, clearly confused about everything, "What just happened-"

"Child..."

Issei heard the deep and raspy voice from the Black Knight, making him flinch at what he said to him, "You, okay?"

Issei couldn't respond, even if he wanted to as the shock is so profound that he is unable to answer which makes the Black Knight sigh at this, "Do not worry, child. When you wake up, the only thing you know is that this is all a dream. Pupa, do what you must to the one known as Issei Hyoudou..."

"Wait... How did you know my-" He didn't finish before his eyes suddenly rolled back and he dropped down, as if something had just dropped him to sleep.

As the Black Knight looked upon the sleeping Issei, he then looked at Raynare who has a difficult time standing up as she glared at the one that had just punched her, "W-who... Who the hell are you?"

The Black Knight looked upon the Fallen Angel in silence before finally saying, "Why should I bother introduce myself to one who is pathetic and weak."

This made Raynare snarl in offense at being called weak, "YOU DARE!" She then fly off above as she then conjured dozens of light spears in midair as she screamed, "I'LL SHOW YOU WEAK!" She said as she throws volleys upon volleys of them towards the Black Knight.

Raynare would have smirked at such an easy victory but her smirk morph into one of shock as the Black Knight chanted...

"Argent Unbreakable Defense."

And this results in a dome-like barrier appearing around the Black Knight as the light spears only fizzles into nothing when it comes into contact with said barrier.

Before Raynare could give an appropriate response, the Black Knight suddenly appears behind her and she felt herself smashed into the floor, feeling the massive impact from such a fall itself alongside how hard the Black Knight just kicked her.

As Raynare tries to stand herself up from the crater, she saw the Black Knight is looking down on her, his visage a stuff of intimidation as he said, "Such a lowly foolish whelp like you, who think so mighty of herself that she dares to delude herself in believing how big she is when reality does not conform to your foolish delusion."

Raynare then felt herself lifted from the back of her neck as Raynare struggled yet unable to break free as she is face to face with the intimidating visage of the Black Knight himself, "Allow me to wake you up."

Raynare then get to feel herself get punched in the face hard as the Fallen Angel is thrown and skidded on the floor, being bruised from such an awful punch.

Raynare stands up as she glared at the Black Knight as she hastily fires another light spear at him only for him to just smacked the projectile away by basically bitch slapping it, "Weak." Another light spear is thrown yet the Black Knight swatted again, "Pitiful." And again, "Pathetic." And again, "So sad."

Raynare is about to throw another light spear only to find out that the Black Knight is close to her, making her yelp as he said, "Inferior and a waste of time." He then basically bitch slapped Raynare in the face which the slap basically thrown her to the floor as she basically groan.

Then Raynare felt herself stomped hard upon her face as the Black Knight is crushing her hard, "Foolish and pitiful. I can still hear the mind of your foolishness and you think of yourself as superior. You are nothing but a vermin who cannot fathom the inferior weakness of one self and keep such pathetic delusions no matter what. I despise such worms..." Then a katana appears in hand, one with a red blade and a handle that is seemed to be an amalgamate criss-crossed of a bunch of metals of sort, "And worms should deserve the same retribution they are."

Raynare screamed in pain as she felt herself literally stabbed in the back. Then Raynare screamed more as the Black Knight started to stabbed her some more, coughing up blood as she is basically in such a tremendous pain.

"I heard that you are also an Angel that is Fallen from grace itself. Yet..." Raynare screamed more as the katana blade is now getting even deeper as the Black Knight twirled it around as Raynare screamed in even more pain, especially when the Black Knight started to stomp on her bloodied wound, "You still cling to such insufferable sense of superiority despite your inferiority. Allow me to rectify that."

Then the Black Knight casted, "Curse of the Fallen." And Raynare can only screamed as a magic circle as she can feel her wings.

Raynare struggled from the agonizing pain as her formerly black feathered wings is now turned into nothing more than boney wings as Raynare screamed as her wings into a shadow of its former self.

Then, the Black Knight started to grabbed the boney wings, grabbed it and ripped it out of her, making her scream from the pain itself as her back bleeds even more.

"Now, you fall."

The Black Knight had basically quipped as he lift his foot off of Raynare as she struggled to stand up from such an agonizing ordeal.

Raynare can only look at the two bony wings in front of her before reaching her hand to her back, realizing to her sheer horror that her back is bleeding and she no longer has her wings.

"What... What did you do? What did you do!?" Raynare screamed hysterically at the Black Knight as he stares with little sympathy or even empathy at all.

"What do you think? I made you become one with the Fallen, where they become what they deserved for their sinful acts. And you, foolish worm, shall know what it means to truly fall." The Black Knight said, his tone calm yet laced in absolute sadism.

"No... No... This can't be happening... This can't be happening..." Raynare said in sheer terror in her tone.

"Oh but it is. And now, you shall pay the consequences of what your foolish acts of such deluded superiority in the existence in yourself. Feel the ever painful existence of being the biggest bitch around." The Black Knight said, this time becoming a bit more sadistic and cruel as he sees Raynare.

"No... No... No... It was supposed to be perfect... I could have everything... Even Azazel's notice... And... And..." Raynare can only say in despair at her state.

"And now you failed. Karma has finally caught up to one as loathsome as you." The Black Knight said, more sadistic and cruel as ever.

"Y-y-you th-think this is over? My comrades will notice this... They will notice this... They will come and you'll be sorry..." Raynare yelled as she glared in defiance yet failing miserably as the Black Knight stomped his foot on the pavement as Raynare can feel the amount of killing intent from the Black Knight itself.

"Once again, the worm still clings to her sliver of nonexistent pride to hide the pitiful inferiority of yourself..." The Black Knight said, his voice sounding much deeper and more demonic if that is even possible, "Fine then. Go ahead and run away like the spineless coward you are. If there are other worms like you, then they shall fall like you. For your comrades shall suffer the same fate as you. A fate of being Fallen. Now..."

Then suddenly, the Black Knight started to exude a tremendous amount of killing intent from himself, an aura of absolute of dread and horror as Raynare can only stare in horror until finally...

"GET OUT!"

This time, Raynare finally found it in her to scream in absolute fear and terror as she retreats, running away with her tails in between her legs as she run away as fast as she possibly can, this time unable to fly because of her wings.

As the Black Knight watch her go and finally out of sight, he then looked at now sleeping Issei Hyoudou as the Black Knight said, "Nemesis. I call upon you..."

"Is it any wonder that getting a Prime Eldritch Elemental to be kind of convenient..." Ahriman said as he then looked into the horizon of the new world he found himself in as he finally said, "Well, now that's done. How do I start from here?"

And that's a wrap...

Man, you have no idea of the pain I have to go through to finish this yet, I finally did...

By the way, if you have any idea what plot I have to use in the next chapter, let me know in the comments below...

As always...

Ciao...

• Argent Unbreakable Defense:

A demonic spell that allows the caster to surround himself in a dome of demonic energy that both protect the user and anyone foolish enough to charge against them as they are disintegrated from contact.

• Curse of the Fallen:

A Curse Spell that allows the user to cast a curse upon a celestial race like angels that makes them unable to fly, turning their wings into bony wings as a result of the curse itself.