A disclaimer: I don't own Moon Knight or High School DxD.
Issei Hyoudou was walking with his girlfriend Yuuma Amano in the park at nighttime after their date holding hands. Yuma walk forwards to the water fountain in the park and she turns around to Issei with her hands behind her back skip towards Issei with a shy smile on her face.
Yuuma said sweetly," In honor of our first date there is something I want you to do."As she got closer to Issei making him blush.
Issei thought" I'm going to get to kiss totally get to kiss her this rocks."As he looks at his girlfriend that bowing towards him waiting for his response to her request.
Isaiah said," Sure, go ahead."As Yuuma leans forwards giving Issei a clear view of her face that has a sinister smile which spooked Issei.
Yuuma said in a mature seductive voice, "Will you die for me?" Causing Issei to look taken back by her request, but he wanted to see if she can repeat it again.
Issei chuckled," What you say?" "Sorry, something must be wrong with my ears I don't think I heard you correctly.''As he went to clean out his left ear with a single finger and Yuuma came closer to his ear with the same smile.
Yuuma whispered, "Will you die for me?"Yuuma begins to grow taller, taking on a more mature appearance, and her eyes changed, taking on a darker, more evil look. Her clothing also changed dramatically, now consisting of black, strap-like objects (resembling leather) around and under her breasts, a thong-like piece held around her hips by three thin straps, gloves that ran right up her arms with small lengths of chains hanging from them, shoulder guard-like objects on her shoulders with three large spikes sprouting from her right shoulder, and black thigh-high heel boots.
Issei thought" Isn't this what people call an exhibition? " This isn't the time for that.'' "Wings?"As he falls on his ass looking at his date who just transformed into an angel dominatrix of some kind.
Yuuma said, haughty," Although short-lived, playing innocent lovey-dovey with you was fun." "I'll take good care of gift from you.''As she looks at the pink bracelet on her wrist while Issei looks in fear.
Yuuma said," So…." As her hand stretches out a light spear begins to form causing Issei to pale in fear at the sight of the spear.
Issei pleaded," Yuuma." Making Yuuma smiled a predatory smile at him.
Yuuma finished," Please die." She launches the light spear towards Issei making him closes his eyes, but before the light spear could hit him something incepted it along with making a metal clang sound causing them to snap their attention to see stuck in the ground was sliver darting in a shape of a crescent moon.
This Yuuma to look at the weapon in horror while Issei looked at the weapon in confused but before any words could be said a figures lands on the top of the fountain in a crouch position, making Yumma slowly turn to her horror and Issei was 's curiosity was an athletic figure dressed in a black bodysuit that has lightweight plated armor with a crescent moon in the center with a white hood-and-cape but what caught Issei 's attention was the black mask with two narrowed blue slits eyes staring at Yuuma.
Yuuma whispered in fear," No, not you."As the figure stands up now casting a shadow over Yuuma causing her to shudder in fear.
The figure announced, "Now you face Khonshu's champion!" The figure jumps in the air and throws several crescent darts at Yuuma which clipped her wings causing her to scream in pain while Issei winces.
Issei thought" I know she tried to kill me but damn."
Little did they know they were being watched byTōjō Koneko who was ordered by the president of the Occult research club to monitor Issei on his date with Yuuma Amano, who was revealed to be a fallen angel but she got horrified when she saw the white hooded figure show up to save him.
Koneko thought " The president will not like this."
The white hooded caped charges at Yuuma who is holding her wings in pain ,but she didn't have time to prepare as the white figure deliver a jab to the face of Yuuma along with followed by an over the shoulder arm drag which put Yuuma on her back.
The white figure said," Submit ."As he pulls out a crescent moon dart to pressed against the neck of Yuuma who is looking at the white figured in fear and hatred while Issei looked at him in awe along with Koneko.
Yuuma pleaded," I submit, please let me go."But the white figure narrowed his eyes and he pressed the dart even deeper into the neck of Yuuma causing blood to ozze out of her neck making her scream out in pain.
Rias Gremory shows behind Koneko causing the normally stoic mascot to jump back in surprise to see the president of the club. but the President jaw nearly dropped to see the fallen angel being held down by a normal people dressed in wired clothing.
Rias thought" It 's him, but I thought he handled normal criminals and strays."
Rias and Konkeo continued to watch as the whited figured held down Yuuma who is pleading with the figure to let her go,but the figure didn't budge as pressed the dart even deeper in the neck of the fallen angel drawing even more blood.
Issei said," Hey stranger I think you made your point."Which caused the figure to turn towards Issei along with standing up with the dart that has Yuuma blood on it.
The figure said," She must pay for her crimes." Yuuma took this distraction to take out the darts that are in her wings and take flight causing the figure to curse silently making him glare at Issei.
Koneko asked," President should we confront them?" Rias shook her head ,signaling not to confront them making Koneko agree, but inward sigh because she detests the pervert and fears the white figure.
Rias conjures a portal and the girls walk through it,causing the portal to create a flash that grabbed Issei 's attention, making him wonder what was that flash of light, but he shrugged it off causing to turn to see that the white figure is gone.
Issei said," Great I'm talking to myself.'' Issei walks away with his hands in his pocket grumbling about the worst date ever.
Meanwhile, in the apartment room, the white costumed figure was sitting on a couch with one leg over the other leg leaning back against the couch with the masked on their face until used his left arm to take off the masked revealing a young man with brown hair and silver eyes with a slightly tan complexion.
The young man said," She got away damn it, but at least I saved Issei from becoming a devil."The youth get off the couch and he stands in the living room of the apartment in deep thought of how came to this world.
The youth didn't come from the world where creatures of the supernatural are common, but in a world that similar to the real world, but he was a vigilante called the Moon Knight similar to his Marvel counterpart but with a slight difference.
Flashback
The youth was patrolling the streets of Chicago in his costume looking down from the top of a building, inspecting for any signs of criminal activity, but he doesn't which makes him relax for a little bit as he watches the civilians do their daily routines.
His name was Brian Johnson of Chicago, Illinois to two young couples, but on a fateful day, when he fifteen his parents were murdered by a mobster who came across them when he was running from the police. Brian's parents were shot to death and he was too, but before he could die Khonshu came to him to give him a chance of living again, but to become the Avatar of vengeance Moon Knight his favorite comic book character but with a price as he develops a split personality called Moon Knight.
But back to the story, Brian Johnson was pondering about his life and how he ended up becoming Moon Knight of the real world. He remembers almost dying on that fateful but before he crosses over Khonshu in spirt came to him with an offer to live again, but with becoming his Avatar of Vengeance or Moon Knight if you are a Marvel fan.
Brian found out that Stan Lee based Moon Knight on a legendary Eypgtaian warrior named Atem who was a champion of Knoshou but being the champion has its flaws as he developed a separated personality like Marc Spector. Brian did too, and the personality name is called Moon Knight who is cold and vengeful who is currently in control.
Moon Knight thought " No crime strange." Moon Knight turns to see a blue glowing orb floating towards him making him get into his stance as the orb approaches him without doing anything threatening making him slightly drop his guard.
The Orb announced in a booming voice." Brian Johnson of Earth 83 your present is needed to decide the fate of the multiverse."Before Moon knight can give out his argument the orb fires a blue ray that transported him to another plane of existence
Flashback over.
Brian sigh as he remembers being brown to the High school DxD world by the orb which he later found out that was the One above all from Marvel Comic. The one above all told him something coming in the multiverse and him along with a few other are the only ones that can stop the threat. One above all also told that his present is needed here in the DXD world, making Moon Knight think of threats like Kokabiel, Lucifer,Nemesis, etc.
Brian thought" No matter who the threat they will suffer the wrath of the Moon Knight."As he clenches his hands making them crack
Kuoh Academy Occult club room
Rias and her peerage were all at their seat ready to discuss the topics of Issei's survival, a fallen angel on their territory, but more importantly the appearance of the one that called Moon Knight. The club has heard about Moon Knight as he handles regular criminal, but he also handles stray devils and other supernatural creatures making the three factions wary of him.
Akeno giggled," Ara Ara Ara he has been brutal as ever." Making her fellow club members Sweatdrop because out of everyone in the club, she admires his brutal methods in dealing with criminals and strays.
Kiba said," Akeno you may like him, but the rest of us fear him." Making the club excluding Akeno nod in agreement at Kiba's statement because Moon knight is very ruthless in dealing with criminal or strays proof was when he killed a stray devil without a second thought making them shivering minus Akeno who gain a arouse look.
Rias said," I was hoping to avoid crossing him, but he is very unpredictable and dangerous for a human."Which made Rias wonder if he is even human considering his accolades, making him a candidate right next to Issei to get her out of her marriage with Raiser.
Koneko said," President I don't think he is human because no human shouldn't have that type of speed or strength." Making Rias nod along with Kiba while Akeno kept giggling thinking about Moon Knight 's brutal methods.
Rias said," I agree, but let worry about him later because we need to figure what Issei 's sacred gear is." Making the rest of the club nodded their heads in agreement because the mystery surrounding Issei 's sacred gear is the main priority but they will keep an open mind on Moon Knight.
Rias thought " I will get my freedom back."
Author notes: Hey guys this dannyrockon122 giving you guys my first DxD and Moon Knight crossover story. You guess it Moon Knight will be part of the Multiverse Avengers story. Also, Issei will be human in this one and some slight changes to the characters but hopefully you have any ideas please pm .