The high school girl was picture of elegance and grace. The daughter of the Hyoudou Household was seen by many as example to what students should aspire to be.

Guys in Kuoh Academy wanted to approach her, but her mature cool aura made them scared to do so, lest they act foolish in her presence. Girls gathered around her, vying for her attention.

As usual she was walking her path home that took her through the shopping district, seemingly not looking for anything in particular.

Something odd gained her attention. It was a girl approaching her with a flyer. A girl...dressed in the cosplay of a devil? It was a very odd scene, and any who knew the Hyoudou scion would assume she would just politely refuse the sales girl in the gimmick outfit.

However rather than taking a flyer...

"Excuse me... Can I actually have two please?"

Bang!

The door of Issei Hyoudou's room was slammed open with a kick.

"Issei, pause the porn and stop beating your meat, I got something awesome to show you!" Atsuko Hyoudou shouted with a wide grin.

"Dammit, Atsuko!" Issei, with practiced lighting speed born of constant panic at his sister's surprise visits, he bookmarked the page and changed the tab to math lecture video, all while hiding the screen with his body and putting his pants back but and hiding the equipment of his "leisure" time. "I told you to knock! Mom and Dad told you to knock before entering a room! Why don't you ever knock!?" It almost looked like he wanted to cry.

Atsuko easily realized that she probably caught right before his happy ending, like she had done before multiple times-blue ball may be hell, but she couldn't help feel amused at inflicting it-and easily pushing Issei's distress out of her mind.

"Yes, yes, little brother. I totally will next time. Now ignoring the small details like your dick and needing to cum-"

"It's not small!" Issei was now in tears.

"No, of course not. It's a very good sized, beautifully sculpted smooth thick cock that will have all the girls wild if they see it." Atsuko patted her baby brother's head to sooth his cute small ego.

"Stop that! I don't wanna hear that from my sister." Issei whined and lightly pushed her hand away.

"Heh. How innocent." Atsuko daintily covered her mouth with her fingers.

"Stop." Issei intensely pointed. "And stop calling 'little brother', we were literally born at the same time."

"Half a second older is half a second longer in the world than you." Atsuko said proudly with her arms crossed.

"That saying doesn't even make sense!" Issei snapped and tapped her arm.

"Doesn't matter!" Atsuko pumped her hand in the air. "What does, is this!" Then she took two pieces of papers out of her jacket and thrusted them in Issei's face.

"Huh, what the...?" He took on of the paper and read them. They were pamphlets with a large circle deign in the middle, and some instructions on the top and bottom of the page. "'Make a contract with a devil and we'll grant your wish'?" Issei gave his sister a pitying look. "Atsuko please tell me you didn't pay money for this?"

"Nope! A cute girl in a devil costume was handing them out." Atsuko grinned at the memory. Issei found himself pouting in jealousy at missing on such a view. "Come on, let's try them out."

"It says to 'wish with a strong desire for the magic circle to activate'. I dunno, Atsuko this seems silly-"

Atsuko was in Issei's face, looking down at him with a wide empty menacing look on her face.

"If you don't do this with me, I will blue ball you for a whole month like the worst No Nut November challenge you can imagine." She spoke in a low voice, compared to that of a haunting ghost girl. Her hair falling over her eyes definitely made her look like Sadako.

The image would definitely be frightening if she didn't need to stand on her tippy toes to accomplish such a feat.

"Alrighto! Let do some witchcraft!" But Issei was sufficiently frightened anyways, and agree to Atsuko's demand with false energetic cheer.

"Yay~." Atsuko raised her hands and clapped them in the air.

Rias Gremory was in her office Occult Research Club building, finishing her work for the day when she felt a summoning tug at her.

She checked to see who was pulling on her through the contract flyer, as is usual for safety measures.

"Oh," her eyes slightly widened, before she smiled at this turn of events.

She had been taking her time to approach the Hyoudou boy to see if he was worth recruiting, but it looked like her good fortune smiled at her again. Now she can meet, introduce him to the world of the supernatural, and inspect him at her leisure.

"Rias," her Queen, and club Vice President called out. "I'm getting a summons too. It seem like the contracts in close proximity."

Rias raised an eyebrow. "Wait, you mean..."

"The summons I'm getting is from Hyoudou Atsuko." Akeno nodded.

"My, what a surprise. I wonder how Issei convinced his sister to try using a contract flyer?" After all, imaging the aloof no-nonsense Model Student Atsuko believing in something 'superstitious' as devil summoning, was difficult for most people.

"Well, you never truly know how people are like behind closed doors, fu fu fu." Akeno gave a small laugh.

However Rias did see her fair share of people who held differ personas in their work and private lives. Of course, she didn't expect the girl called Next Generation Great Onee-sama to be that different at home.

"She's probably just a little different, more relaxed at home." Rias remarked.

Then again Akeno is the one who has gotten the summons...maybe she wants help confessing her feeling to a boy she's interested in? Rias thought, then nodded to herself at her conclusion.

"Very well, last one of the day. Let's answer this one together then. It should be fun." Rias said in good cheer, and Akeno smiled and nodded in return.

The two devils went to the center of the room, activated their magic to be pulled by the summoning tether and...

"HOLY CRAP, IT WORKED!"

"BOOYAA! WHO DA WO-MAN!"

Well... Rias looked at the scene of Issei looking flabbergasted on his bed with his sister doing a happy dance of pumping her arms in the air and taking exaggerated steps around the room. I suppose Atsuko really relaxes at home?

"Wait, why are the Two Great Onee-samas here?" Issei said with his jaw dropped. "Wait... Atsuko, did we just kidnap our school's celebrities? Shit, are we going to jail!?" He cried out in panic.

Next to her, Akeno covered her mouth and was doing her best to not ruin her cool image by guffawing in laughter.

"Naaah, Issei," Atsuko sat next to her brother and placed an arm around his neck, showing two devils how close the two actually are. Most people in japan tend to be squeamish on physical affection, even simple touch. "The flyers literally materialized them out of thin air, and it said it summons Devils, so clearly they're the devils we're suppose to meet." Atsuko explained.

"So wait, Rias-senpai and Akeno-senpai were devils all along?" Issei wondered. Rias couldn't help by smile at how adorable, if a bit slow, the boy was. It made her want to dot on him, just to seem him blush.

Also his question was a good point to break the ice, and introduce herself.

"That's right, Issei, Atsuko, I am Rias Gremory, and as you two have guess, I am a De-"

"Of course, she's a Devil!" Atsuko interrupted, making Rias's eyebrow twitch, while Akeno's shoulder's shake a bit, as she continued to contain herself from laughter. Atsuko let of her Issei's shoulder to point with both arms at Rias's...waist. "I mean look at those hips!" Issei did so. "Those are literal child-birthing hips. There is no way a girl our age would have those."

Rias began to blush, and nervously sweat at how Atsuko was the more animated one, unlike what she expected.

Akeno covered her nose and mouth with her hand, and took shuddering deep breaths to let out her laughter, without voicing it. She couldn't stop smiling through.

"Huh, you're right. The hip to bust ratio is also perfect. Honestly, the first time I saw Senpai I thought they walked out of a porn studio." Issei said analytically.

"Oh really?" Rias's eyebrow twitched again. Akeno, now seeing her King's reaction, was biting her lips.

The two Hyoudous were proving to be very entertaining.

"'Just a little different, more relaxed at home', huh." Akeno noted.

"Shut it." Rias said under her breath, which only Akeno could hear, as the siblings still seemed engrossed in their discussion.

"I know, right?" Atsuko continued, uncaring of Rias's increased ire. "Like seriously, those breast? No sag, always taut and smooth, but still perky and soft. Can you honestly tell me that breasts that large and supple are natural on girls my age?"

Issei's eyes widened, as he sat up in full realization. "Those breasts aren't natural. They're supernatural!"

"That's right!" Atsuko nodded.

"They are Devils!" He pointed at the two devils like a detective that uncovered a giant mystery.

"Bravo~." Akeno gave a golf clap.

"Okay!" Rias just had about enough. "I'm a Devil, so is Akeno, you summoned us, let's hear your wishes and discuss the price. No sidetracking!" Rias said with a flare of her demonic aura to make the humans focus on her, and listen, while pointing at Akeno when she said the last part.

Akeno pointed herself in mock shock. "Moi?"

"Silence." Rias said. Akeno did so while feeling a shiver. It was fun, but sadly rare, when Rias acted strict like that. "Now..." Rias took a deep breath, before recentering herself and smiling at the human pair, a bit calmer now. "Miss Atsuko, Mister Issei, how about we start over. Rias Gremory, Devil answering your summons to grant a wish. What are your requests?" She said with a smile.

"I want to see real life boobs!" Issei said immediately. Rias huffed in amusement, she suppose she shouldn't be surprise.

"He's lying!" Atsuko cried out, making the devils look at her in surprise.

"No, I'm not." Issei protested.

"He totally is. I wants to finish jacking off since I cockblocked him earlier and now he's blue balled." Atsuko said bluntly, while smiling and nodding to herself, like she was doing her brother a service.

"You didn't have to tell them that!" Issei shouted.

"Oh dear," Akeno chuckled. "Should we switch and I take care of his wish, Buchou?" Akeno said to Rias in merit.

"Let's just," Rias sighed and cover her face with her hand. "Hear what Atsuko wants first."

Honestly, the image Atsuko had cultivated in her school time, had been damaged erratically.

But maybe that's just how she is, alone around her brother as she feel safe and intimate to act freely. Looking at it from that light, it's a pretty heartwarming thing. And that Atsuko was so blasé about sexual matters is due to living with Issei, so I shouldn't be so surprised. Rias comforted herself with the thought.

Atsuko stood on the bed and pointed at her crotch. "I want a magically retractable giant bitchbreaking futa dick, that makes all the bitches go in heat and ahegao, and all the traps be hypnotized."

And thus once and for all, the image of Atsuko Hyoudou was completely and utterly shattered in Rias's mind.

Thud.

And Akeno had fallen on the ground, holding her stomach and guffawing without control.

"What?"

And on that day Rias Gremory first learned that between the Hyoudou siblings, the Oppai Loving Pervert Issei was the tame one.

"What the hell, Atsuko!? Why are you stealing my dream of getting a harem!" Issei protested in indignation.

"I'm not stealing! I'm giving myself a chance to get one! A reverse harem of just guys is boring. I need some cute, or sexy girls or both, and being the one to dick them down is hot. So that's why." Atsuko shot back.

As the two siblings began arguing Rias rubbing her forehead temple, and poked Akeno with her foot to stop laughing and get up. Rias was worried that she would start get a headache.

"Okay enough!" Rias commanding tone shut everyone up. She took control of the situation, got everyone seated, and hoped to restart discussion on a more sane note.

Rias recentered herself, took a deep breath, and smiled once more to the Hyoudou siblings.

"Now then, Issei, why don't you state your wish, so we can tell you both the cost of each wish?"

"Right." Issei nodded.

He looked toward his sister, and communication at high speeds that could only come from two people familiar with each other passed between then.

"This is it, Issei. Your chance. Don't fuck this up. Do. Not. Fuck. This. Up."

"I won't!"

The two nodded then looked back to the devils. Rias mentally admitted to herself that this was mildly amusing, while Akeno just gave a lady-like chuckle.

"I want to see both of your boobs!" Issei declared with determination.

"You dumbass!"

SMACK!

Atsuko got one of the many paper fans that she hid around the house, and smack Issei across the back of his head.

"Ow! Atsuko, what the hell? I thought we're cool about me pursuing my dream!" Issei cried out which rubbing the back of his head.

"Your dream is to see two pairs of tits? That's what the internet if for, idiot!" Atsuko countered back.

"People who call others idiots are the actual idiots!"

"Well I am and idiot and know that! Do you!?"

"Yes! I... Which one do I know is an idiot?" Issei pointed between himself and Atsuko, the winds in his sail taken out by the confusing grammar.

"Fufufu," Akeno laugh cut through the argument, making the siblings look toward her. "Issei, you can wish for whatever you want, you don't need to worry limits. At least until the price comes up, then we'll see where we go from there."

"Right, right, sorry. I just got distracted by a set of awesome boobs." Issei bowed his head a bit.

"You need to rise above the tits, Issei-"

"Blashphamy! Say that again and I'll disown you from the Hyoudou Household!" Issei dramatically pointed at Atsuko.

"-And aim for the harem you always longed for. Bitch! I can't disown me, I have seniority! I can disown you!" The heartfelt advice got turned into a threat.

"For the last time, we're the same age. You're not older than me! Thus as the man of the house, in the absence of our parents, I set the rules." Issei defended his point.

"No, I have proof!" Atsuko dramatically stood up.

Issei's eyes widened in horror. "No, NO! It can't be. I destroyed them all! I made sure of it." Issei jumped and stood up, leaning back from his terrifying sister.

"Destroyed what?" Rias asked, while all her instincts were telling her to avoid this topic, and in fact run away from his crazy house and forget the contract.

"Proof that I am the Older Sister!" Atsuko took out a photo from between her breasts under her clothes, and shoved it in Rias's face. "Father took this photo of our Mother's Glorious Puss-Puss during our moment of birth. Clearly you can see my head is above that of Issei, thus giving me the lead into this world by half a second!"

"MY EYES!" Rias covered her face, jumped so far back as to slam her head into the wall, breaking her head through it and knock herself out.

"Rias-senpai!" Issei was by Rias's side in moments, having also sneaky snatched photo, crumbled and throw it into the trash can. "Akeno-senpai, do you have any magic that can destroy that thing, or just a lighter?" Issei asked as he took Rias out of the wall, and slowly set her down on the ground, while holding her head.

"Hahahaha, y-yes, I have something." Akeno said through tears, while holding her side. She pointed one finger at the trashcan.

"NO!" Atsuko tried to jump and save the photo, but a small and focused burst of flame grew from within the trashcan, burning everything inside, and extinguished itself leaving nothing but ash in the trashcan. "Mother's Glorious Puss-Puss..." Atsuko said in a low solemn voice while pouting.

Rias started to wake up. "Huh, Issei?" her eyes blinked a few times, as she tried to recall the last few moments. "What happened? I came here with Akeno for a double contract and then..." She frowned her cute little eyebrows in thought.

"Aaah," in a moment of clarity and wisdom, Issei knew not to tell her what happened. "It seems like you were so mentally tired that you doozed off for a bit. You should take care of yourself, Senpai."

"Aaah," Rias had remembered now, but chose Issei's version of the events. "Yes, thank you, Issei. I'm sorry for being a bother."

"N-Not at all, I don't mind looking after you, whenever you need." Issei said sincerely, not really thinking about this words.

Rias found herself actual blushing at the heartfelt words.

"So, that is one wish for a futa dick and one wish for a harem, correct?" Akeno said nonchalantly, holding a devil device for measuring wishes and their cost.

"Ahem, yes." Rias fake coughed, and stood up, everyone returning to their seating arrangement again, now finally discussing the important reason they were all here for. Issei was blushing from holding Rias so close previously. Atsuko was pouting at the loss of one of her Older Sister Proof photos. Rias was glaring at bit at Atsuko and Akeno was trying not to laugh again.

"For Atsuko's wish...it would cost you half your life." Rias couldn't help but take some pleasure in delivering the news to the girl who just traumatized her.

"Like if I was gonna live until 80, now I would live until 40?" Atsuko asked, actually taking the whole thing seriously.

"Wait, you can't seriously be thinking of accepting that?" Issei said alarmed.

"My life, my choice. Besides, tell me you wouldn't do the same if you had the chance be married to a dozen beauties, bang them and knock them all up, but only get to live for 10 years?" Atsuko challenged, to which Issei raise a finger about to object, before grimacing and looking to the side, not having a counterargument.

"It says you would physically age to the age you would have at half your life." Akeno explained with a smile.

"Hmm..." Atsuko stroked her chin. "Would I look hot as a MILF? No, better question is, where can I get the job certifications so I can bang boys and girls at Kuoh Academy, and secretly build my harem in the background?"

"Ah, as expected from Nee-san. The moment you become a Christmas Cake, you're already planning to be a predator." Issei nodded to himself, almost in awe at his sisters ability to adjust her plans on the fly.

"Like you wouldn't do any different!?" Atsuko protested.

"I, ah, well..." Issei laughed and scratched the back of his head, only to see the deadpan look Rias was giving him. "Of course I wouldn't! ...If they try to seduce me however, I can't do anything. I'm just a weak willed man." Issei gave a hapless shrug.

"Very plausibly deniable." Atsuko nodded in support of her brother.

Rias sighed. "That's all assuming that Sona would let you get a job at Kuoh, even if you somehow get a teaching degree, while knowing you're doing it to have sex with the students." Rias pointed out.

"...The Student Council President is a Devil." Atsuko nodded at the thought. "Thinking about it, I actually shouldn't be surprised."

"How so?" Rias raised an eyebrow.

"No one that loved bureaucracy that much could possibly be human." Atsuko pointed out.

Rias opened her mouth to defend her childhood friend against that devil stereotype... And found that she couldn't. "Very well." She nodded.

"So, you're actually okay with that price?" Asked Akeno putting things back on topic. "You're not going to get a free teaching degree, or anything else to work around suddenly being a middle-aged woman." Akeno pointed out.

"Actually, wouldn't your parent worry about you suddenly disappearing, since you know, you wouldn't be able to stay around while looking like a different person?" Rias pointed out.

"Nah, I would just explain to them what happened, and they would accept it. Their only worry would be that their daughter is now a middle-aged woman with no job and hasn't settled down with a husband yet." Atusko said casually.

"Yeah, I can see that being their reaction. They're pretty chill about a lot of stuff." Issei nodded as well.

"...Huh." Rias had nothing to say to that.

"Are there any other methods I can pay, or other ways my wish can be fulfilled?" The Hyoudou only daughter asked.

"Well, it is possible to fulfill your wish by using Transformation Magic." Akeno said. "I would have to study the spell for it, then get back and use it on you."

"How long would that take?"

"About a month."

"Huh..." Atsuko gave it some thought and quickly nodded. "And the price?"

"Well, it's not half our life." Akeno started out.

"Neat." Atsuko smiled.

"It would be 6,913,324 Yen." Akeno delivered with a customer service smile.

""WHAT THE HELL!?"" Both Hyoudou Siblings exclaimed.

"What kind of Devils would take cash?" Issei asked in disbelief.

"No, no, that actually makes sense. Devils invented money, and Money is a root of all Evil, so of course Devils use it to collect on human misery." Atusko brilliantly deduced.

"No, no, no," Rias and Akeno waved their hands in a 'no sign'. "We did not invent money, that's just a false myth." Rias explained.

"Spoken like a true Devil." Atsuko nodded in awe, at the devils cleverness, and Issei mirror his sister in agreement.

Akeno covered his mouth to hide her laughter, while Rias just sighed. Changing their minds would be a lost cause.

"So the half a life thing and the money are no go." Issei said in a surprisingly firm tone. "I'm not letting you die young Atsuko," Issei's soft tone, had Atsuko smiling at the care in his voice. "And the money is no go, as there's no way two high school students would have that much."

Rias found herself smiling at the siblings interaction. She noticed though, that Atsuko had a thoughtful look on her face, before she nodded in agreement with her brother.

...Surely she doesn't actually have that amount of money lying somewhere.

"Well," Rias sat up straight, letting her body's allure, as well as confident body language and voice be on full display. She decided this was a good segue as any into her recuirtment speech. "There is another way," she paused to hook her audience in. "It might even work as the method and price for granting Issei's wish too. Letting you both get your wish for one price so to speak." Rias smiled charmingly.

"And that is...?" Issei spoke, him and his sister leaning forward, synconized in their interest.

They're adorable in their own way. Rias thought. ...Mostly Issei though. I take back ever thinking Atsuko was cute.

"Becoming part of my Peerage." Rias smiled.

She explained the Evil Chess Pieces system, and the reason for it's existence, along with it's uses. Rias explained the differences between a Devil and a Human, along with the advantages of the former and how it could help both Hyoudous reach their dreams.

From the look on their faces, Rias was sure they were both hooked.

"Wow, that deal sounds a bit way too convenient." Atsuko said startling Rias, and even Akeno was surprised at the human girl's response.

"Eh?" Issei looked toward his sister.

"I mean 'become a Devil and all your dreams come true due to the specific way being a Devil can grant your goals' is definitely on the side of too good to be true." The look Atsuko gave Rias made the Devil Princess start to reassess the girl in her mind. Unlike Issei she definitely wasn't just driven by instinct like Rias initially thought from this meeting.

"There's probably a downside, like starting out as a Devil, you would be at the bottom of the totem pole, and need to power level your way up, to be High Class so you can get your harem. For me I would probably have to spend a long amount of time studying magic to get my futa dick."

"Awww." Issei looked down like a sad puppy.

The girl had seen right through the Gremory Devil, and now Rias was starting to sweat a bit that convincing the duo would be much harder.

"The upside is that you'll likely reach Shounen Protagonist levels of power, and have a harem of hot Battle Babes. Same for me, but I would be a Mysterious Seductive Witch and all." Atsuko grinned.

Then the girl threw Rias into another loop.

"So screw it, let's do this. TAKE ME, SEXY-SENPAI!" Atsuko jump forward with her arms wide open, at the startled Rias.

ZAAAP!

"...Thank you, Akeno." Rias said leaning back while blinking a few time, still in a surprised state at Atsuko's sudden lunge.

"No problem, Buchou." Akeno smiled, however this time her smile had a more sadistic edge to it, as she looked at Atsuko in interest.

The electrified form of Atsuko twitched on the floor.

"Atsuko, are you okay?" Issei asked in alarm.

"Y...Y-yeah, yeah." Atsuko slowly stood up. "I'm alright, I'm alright. Everything is good."

Atsuko stood up facing the calmly smiling Akeno. The Hyoudou girl stood relaxed and mollified before the devil.

Atsuko's arms shot up and grabbed Akeno's boobs.

"Ah..." Akeno let out a breath out of surprise than anything else.

"!"

"!"

Both Rias and Issei were surprised by the girl's action. Not that Atsuko wouldn't want to grab Akeno's breasts, but that she would do it, right after being zapped.

"Honk, honk!" Squeeze, squeeze.

ZAAAP!

"Atsuko, no! Don't die!" Issei went to her side, cradling the twitching, now smoking form of his sister. "At least tell me how they felt like first."

"Levia...Land." Atsuko said.

"You mean the giant mochi we felt there?" Issei asked with wide eyes.

"S-softer... Boing boing..." Atsuko fell unconscious with a peaceful smile.

"Atsuko, my dear sister..." Issei let out a single tear. "Your sacrifice will not be forgotten."

Rias facepalmed. Akeno giggled.

After a moment of silence, with Issei placing his sister on the bed.

"So, wanna be turned into Devil to get started on that harem?" Rias threw out any type of subtlety out of the window. It was wasted on the Hyoudous.

"Do I!?" Issei looked back with a giant smile.

A few moments later, Atsuko woke up with a small headache, and an awesome feeling in her hands from her last memory.

"Hehe, boing, boing." She giggled the feeling still fresh in her mind.

"Atsuko, check it out." Issei called out.

Atsuko sat up on the bed and placed her legs on the floor. She looked up to see her brother standing before her, grinning with leather wings coming out of his back. Devil wings.

"Sweet! You look totally dashing, bro." Atsuko gave her brother a thumbs up, which he return. "Now my turn!" Atsuko jumped up, smiling at Rias in excitement.

Rias however was looking at Atsuko with an apologetic smile.

"Ah, sorry Atsuko, but there aren't any Pawns left." Rias looked mildly regretful about that. Most of her wanted petty vengeance on the girl, by annoying her and denying her wish. Just for a little while though.

"Wait, what?"

"Well..." Akeno proceeded to explain how Rias had measure both siblings potential, and whole Issei was worth 8 Pawns, causing Rias to proceed and turn him right away, it turned out Atsuko was only worth one and a half Pawns.

"So you mean..." Atsuko slowly lost her grin, as a look of shock came to her.

"I can't turn you, Atsuko. Sorry." Not too sorry though. Rias mischievously thought. "The smallest value Piece I have now are a Bishop or Knight worth 3 Pawns. So, um...Teehee, guess it's just bad luck." Rias playfully shrugged.

Atsuko was quiet for a moment. Tension seemed to rise in the room.

Finally she turned to Issei with her arm extended out, hand open.

"Givu." She said childishly.

"'Givu'? Give what?" Issei asked in confusion.

"Givu, givu!" Atsuko insisted.

"Atsuko, they're in my Soul now. I'm not gonna give you a piece of my soul. Two Pieces actually." Issei tried to reason, which just sounded like bragging to Atsuko and pissed her off even more.

"Give me a part of your soul, you greedy stingy bastard!" Atsuko lunged at Issei.

"No!"

"Gimme!"

"No!"