Chapter Text
Subaru: “I’m home!” Subaru Natsuki had just returned home from school and from talking to his girlfriends. What were they talking about? Their plans for tomorrow, Saturday. April 1st, Subaru’s birthday. Subaru and his girlfriends were discussing the plans the three of them were going to do on his birthday. You heard that right, Subaru had two girlfriends, their names were Emilia and Rem.
About 7 years ago, the Japanese government passed a new law that legalized polygamy on account of Japan’s declining birth rate, but most people just assumed that it was so politicians, and wealthy businessmen could make their mistresses into their legal wives without breaking the law. But over the past 7 years, people adapted to it and now polygamy relationships were seen as commonplace now, mostly with someone having at most 2 or 3 partners but some do have more but it is rare and is still looked down upon as bad.
Anyway, back to Subaru’s girlfriends. His first girlfriend is Emilia Elior. She is a sweet innocent girl with naturally silver hair, a super pretty face and an amazing figure. She used to have long hair but recently after a fight with her foster father, a man named Puck, she cut it short, got her ears pierced and started to dress like a stereotypical bad girl. Despite her change in looks, Emilia is still the nicest girl you have ever met. Being nice to even people she hates, and Subaru is glad to have her. Subaru still misses her nice girl look but he still loves her with all his heart even if she dresses like a thug.
Subaru’s second girlfriend is Rem Mathers. She is a year younger than Subaru and is absolutely devoted to him. During his last year of middle school, he saved her and her twin sister, Ram, from some thugs and she has been in love with him since. At first Subaru wasn’t sure if he should make her his second girlfriend but Emilia convinced him otherwise, now the three of them are happily together. Rem has hip length blue hair (She and her twin were born with naturally impossible hair colors as a part of a gene modification experiment that their parents happily volunteered for), an adorable face, and while not as endowed as Emilia, she was still stacked in both her chest and her butt. There have been times when Subaru wanted to grab Emilia or Rem’s assists, but he was keeping that under control. But that would end tomorrow as at the end of their date Emilia and Rem told him they were going to give him their virginities. Subaru was excited for tomorrow as he knew it was going to be the best birthday ever.
Back to the Present, Subaru’s announcement that he was home was greeted by the voice of an angry sounding young girl. Beatrice: “About time you got home, Subaru! Where have you been!?”
This girl was his younger adopted sister Beatrice. She had long wavy golden hair, a cute baby face that was at odds with her figure. She has MASSIVE G-cup breasts that looked bigger than they really were given her shorter height and a large thick butt and wide hips perfect for birthing lots of kids. And the craziest thing about her was the fact that she was only FIFTEEN YEARS OLD, turning 16 in two months after Subaru turned 18 tomorrow. One of the only things that was appropriate for her age was her height which was only around Subaru’s chest. She was the child of a close friend of his father who died tragically in an accident, and they decided to take her in when she was 6 and he was 8. Beatrice was currently wearing a tank top that had the words ‘Shadow Magic’ written on its chest, it struggled to contain her large boobs, and really short shorts that showed off most if not all of her legs.
Subaru patted his little sister on the head and said: “Sorry Beako. I was busy planning for tomorrow with Emilia and Rem.”
Beatrice batted his hand away and asked: “What’s so special about tomorrow?” Subaru looked at her for a few seconds in disbelief that his little sister would forget his birthday only for her to start laughing at the face he made. Beatrice: “Hahahaha, The look on your face is priceless, Onii-san. Betty would never forget your birthday, Subaru. And sorry about the harsh greeting. Betty is just a little hungry is all.”
Subaru smiled at his adopted sister’s teasing as this was common for the pair. Subaru: “You almost had me there, Beako. But shouldn’t mom be in the kitchen making dinner?”
Beatrice pulled out a note and read it allowed: “‘Dear Subaru and Beako, Me and your mother are going to be out tonight and for most of the day tomorrow because we are getting Subaru’s birthday gift ready. We trust you two to take care of yourselves until we get back. Love Daddy.’”
Subaru sighed and said: “That is just like them. So, what do you want for dinner, Beako?”
Beatrice put a finger to her chin and thought for a moment before answering: “How about something easy to clean up after like pasta?”
Subaru smiled and said: “Pasta it is then!”
Subaru started to take off his shoes while Beatrice walked back to the living room, giving her foster brother a good look at her large sexy ass. As Subaru started to get a boner, he mentally told himself off for getting that way for Beatrice. Subaru is ashamed to admit that he has had a lot of fantasies about adding Beatrice to his harem and making her, along with Emilia and Rem, his wife but he kept it buried on account that she and he were technically siblings and the brotherly instincts he had wanted things to stay that way even though they weren't blood related. But little did Subaru know it, but Beatrice felt the same way with her dream since she was 7 was to be one of Subaru’s wives but she couldn’t find the courage to tell him. Little did Beatrice know that tomorrow, her wish would finally come true.
After the siblings had eaten and watched TV together, they both went to sleep. While they were sleeping something unexpected happened to Subaru. From his head sprouted a pair of horns and from his back a pair of bat wings as well as a classic devil tail. Subaru didn’t feel any pain as they emerged from his body, but he felt a shift in his dreams. The previous dream lost and forgotten, Subaru found himself being sexually serviced by several girls including both of his girlfriends, several of his classmates, one of his teachers, the school nurse, a trio of girls he didn’t know and the last girl to service him was his adopted sister Beatrice. Before the dream could continue though, it ended, and the previous dream returned. But little did Subaru know that each girl in that dream had also said dream as well and the dream had marked them each as his.
The next morning, Subaru woke up to a strange feeling on his dick. He sat up, still half-asleep, turned to the mirror and saw his new ‘features’ which shocked him fully awake. Subaru: “What the!?” It was at that moment that Subaru, now fully awake, remembered that his dick felt strange. Throwing off the blanket he saw that his foot long cock was currently being sucked on by…
Subaru: “WHAT ARE YOU DOING, BEAKO!?” his younger adopted sister, Natsuki Beatrice.
Beatrice takes the cock out of her mouth and says, lustfully: “Good morning, Onii-san. Betty was just giving you a wake-up blowjob full of her love.”
Subaru: “I can see that! But what I want to know is why!?”
Beatrice sits up showing that she was as naked as the day she was born. Subaru wanted to look away, to preserve the pair’s brother/sister relationship, but his instincts weren’t letting him. Instead, his eyes were drinking in every inch of Beatrice’s naked body, from her large, juicy tits to her dripping wet cunt. Beatrice: “For so long, Betty has been in love with you, Onii-san. Not as a sister but as a woman. Until now she was too afraid of saying anything about it, but now Betty has the courage to say it. Subaru, Betty loves you with all her heart and wants to be one of your girlfriends and later on wives.”
Subaru wasn’t sure how to respond but his body somehow, without his input, did as he slowly brought Beatrice into a hug and kissed her full on the lips. One of Subaru’s hands grabbed her large soft ass making Beatrice moan into the kiss with pleasure while the other hand grabbed the back of her head and ran its fingers through her soft wavy hair as his tongue danced in her mouth. He felt her large soft jiggly tits pressed against his chest, he loved feeling them and the rest of her soft feminine body against his. Beatrice was also enjoying the feeling of her brother, the son of the people who took her in, caressing every inch of her body. The pair kissed for 5 minutes before breaking off the kiss. Subaru looked into Beatrice's eyes and the part of him that viewed her as his sister seemed to disappear completely and the part that saw her as a woman, took over.
Subaru grabbed Beatrice’s hips and lifted them up and started to align them with his large throbbing foot-long cock. Subaru looked at the girl he was about to have sex with for the first time and asked: “Are you ready to become my woman, Beako?”
Beatrice smiled and said: “Yes, Onii-san. Betty is ready to become your girlfriend. Please take Betty's virginity and make her yours forever!”
Not needing to be asked twice, Subaru brought Beatrice down onto his cock, impaling her. Beatrice screamed in immense pain from Subaru’s cock somehow being completely sheathed inside of her. Her blood stained Subaru’s futon leaving proof of the theft of her chastity. Subaru almost came just from inserting himself into Beatrice's TIGHT cunt and it was indeed very tight. Which was a given considering her age. They gave themselves a minute before they truly started fucking. After said minute, Beatrice looked into Subaru’s eyes silently begging him to start pounding her pussy until it was forever ruined for anyone else. Subaru was happy to give it to her as he started to move his hips.
PLAP! PLAP! PLAP!
Beatrice wailed as her foster brother pounded his foot long cock in and out of her. Not wanting to disturb the neighbors, Subaru plugged Beatrice's mouth with his own again. Subaru looked into his adopted sister’s eyes and saw that her head seemed to be filled with nothing but him. And the part of him that loved her as a woman thought: ‘Beako isn’t just my little sister, she's the girl who occupies the third spot in my heart. She's mine! No one else can have her!’
PLAP! PLAP! PLAP!
Beatrice's thoughts were much the same. Beatrice: ‘Subaru, Onii-san is fucking Betty, Onii-san is make love to Betty. Betty loves her Onii-san, Betty wants Onii-san to make love to her everyday. Betty only wants to be with Onii-san. Betty only wants to be Subaru's wife!’ Beatrice’s thoughts were consumed by her lust for her foster brother, a lust she was keeping to herself for almost a decade but now she was free to express her love for Subaru to her heart's content.
PLAP! PLAP! PLAP!
Subaru was enjoying Beatrice’s pussy. It finally started to loosen enough for the two to start feeling the tidal waves of pleasure from the act of Subaru's cock inside of Beatrice's cunt. He was also enjoying her large soft breasts pressed against his chest. He was getting the strong desire to suck on her nips.
PLAP! PLAP! PLAP!
Wanting to suck on Beatrice’s milkers, he released her mouth and moved his to her fully erect nipples, latched on to them and started sucking on them like they were the most delicious thing in the world. Of course, with her mouth free, Beatrice was able to yell out how much she loved Subaru.
Beatrice: “SO GOOD!!! ONII-SAN’S COCK IS SO GOOD!!! BETTY LOVES ONII-SAN’S COCK!!! BETTY LOVE ONII-SAN WITH ALL HER HEART!!! BETTY WANTS TO RECEIVE ONII-SANS LOVE EVERYDAY FOREVER!!!” Beatrice was well and truly Subaru’s woman now; no other man would be able to satisfy her now. Nor would she want any other man. Subaru was all she wanted.
PLAP! PLAP! PLAP!
After pounding and sucking Beatrice for 7 minutes, Subaru let go of Beatrice’s nipple and yelled: “Get ready, Beako! Your Onii-san is about to cum! I’m going to leave proof that you are mine now forever! Got it!”
Beatrice: “Yes, Onii-san! Betty is ready! Betty is ready to become your woman forever!” And with those words exchanged…
SPLURT!!!
Subaru flooded Beatrice’s womb with his seed. Subaru’s cock was preventing any of his seed from getting out of her, so it just kept coming. After cumming for 3 minutes, Beatrice’s stomach looked like she was already pregnant with the beginnings of a baby bump. Subaru laid Beatrice down onto his futon and enjoyed the look of his adopted sister. Her skin was covered in both of their sweat, her stomach was slightly swollen from his seed still trapped in her womb, and her face was stuck in a look of pure pleasure with her pupils having turned into pulsing pink hearts. He then noticed that her crotch glowed for a brief second before the light faded, revealing a dark pink crotch tattoo. Subaru removed his cock from Beatrice’s cunt letting the baby batter he put in her leak out, letting her stomach return to normal. But Subaru still wasn’t done with her and said as much as he plunged his cock right back into her.
Subaru: “Don’t pass out yet, Beako. We still have a lot of loving to do.”
Beatrice: “Yes, Onii-san~. Betty wants more of your love~” As the two return to fucking, Subaru can’t help but feel like he forgot something.
***
2 hour later…
Emilia: “Are you sure we should check on Subaru by entering his house, Rem? He could have just caught a cold and forgot to charge his phone last night. It’s happened before.”
Rem answers while fishing for the spare house key Subaru gave to her: “If that was the case, Beatrice would have answered when we called her phone instead.”
In front of the Natsuki residence were Subaru’s girlfriends, Emilia and Rem, who went to Subaru’s house after he didn’t show up for the birthday date they had planned and wasn’t answering his phone when they called him. Emilia was dressed in her new punk style black outfit with a white spring coat on top of it. Rem meanwhile was wearing a white long skirt spring dress. The girls entered their boyfriend's family home not knowing that they would end up joining Subaru and Beatrice’s ‘bonding time’.
After entering they heard sounds coming from upstairs and went to investigate. They found that the sounds came from Subaru’s room, they cracked the door open to find…
PLAP! PLAP! PLAP!
Beatrice: “So Good!!! Betty loves Onii-san’s cock!!!”
Their shared boyfriend fucking his younger adopted sister from behind. The two also noticed that from Subaru’s back were a pair of wings and a tail growing out of his back as well as a pair of horns growing out of his head. The girls could see that they weren't part of a costume and were real. But the thing that shocked them the most was his eyes. They weren’t the gentle, loving eyes they had come to know, instead they were the eyes of a predator that was enjoying his newest prey.
PLAP! PLAP! PLAP!
The normal thing to do would be to try and stop this but something strange came over the pair of girls in that they couldn’t move their legs or say anything. They only stood there and watched the man they love pound his underaged foster sister’s pussy. While they couldn’t move their legs, they could move their hands but said hands weren’t moving in the way they should be.
PLAP! PLAP! PLAP!
Instead, the girls hands started to move to their clothed tits and pussies and started to caress them. That’s right, Emilia and Rem were starting to masturbate to the sight of the man they both loved fucking his sister from behind. Before long, their hands were under their clothes to pleasure themselves directly. As the pair started to let their moans escape their lips…
Subaru turned to the door and said: “I knew I was forgetting something… Emilia, Rem come in. I will be right with you two as soon as I am done with Beako here.” As Subaru said that, he raised his tail and shoved the end of it into Beatrice’s asshole, making her wail in renewed pleasure as the tail seemed to pump some strange purple liquid into her butt hole.
PLAP! PLAP! PLAP!
Emilia and Rem could only follow their beloved’s orders and entered the room. Their clothes parted here and there to give their hands easier access to their girly parts. Subaru spoke again, in a commanding tone: “Emilia, Rem strip.” and the girls did as they were told, taking off every article of clothing on their bodies. When they finished stripping…
SPLURT!!!
Subaru once again creampied Beatrice. He removed both his cock from her pussy and his tail from her asshole. He walked over to his desk chair, sat down, looked at his now naked girlfriends and gave them an order.
Subaru: “Suck my dick clean.” Emilia and Rem walked over to their boyfriend, kneeled in front of him and did as they were told and started to suck his cock. Emilia was sucking the head of his dick while Rem licked his seed filled balls.
Subaru patted both of them on the head lovingly and after they were finished, he got up, sat back on his futon and said: “Emilia, come here and sit on my lap. I want to take you while we are face-to-face.”
Emilia smiled, crawled over to Subaru and did as she was told. Before he started fucking Emilia, Subaru looked over to Rem and said: “Come over as well Rem and continue to masturbate. I will be with you after I am done pounding Emilia.”
Rem, like Emilia, smiled and did as she was told, crawling over to the futon and started plunging her fingers into her dripping wet cunt. While Rem was doing that, Subaru grabbed Emilia’s hips, lined up his cock with her cunt and in one thrust shoved it deep inside her, making her scream with uncontained pleasure. After giving her a minute to adjust, Subaru started to pound Emilia.
PLAP! PLAP! PLAP!
Emilia wasn’t as tight as Beatrice was but her pussy’s muscles still felt amazing. It was like they were desperate to get his dick to cum inside her so she could become a mother and have his baby. It also felt great for Emilia if her wails were to be believed.
Emilia: “So Good! Your cock is hitting my womb just right! I can’t stop cumming! I love you! I love you! I lo-MMMPH!” Subaru plugged up Emilia’s mouth with his in a streamy, passionate kiss.
PLAP! PLAP! PLAP!
As Subaru was pounding his girlfriend into insanity, he felt hungry from skipping breakfast and instead fucking Beatrice. Not wanting to stop his fun with Emilia, he spread open Emilia’s asshole and, like with Beatrice, shoved the end of his tail into her rear door, making her moan lewdly in the process, and started to pump that same purple fluid into Emilia.
PLAP! PLAP! PLAP!
Emilia started to feel the effects immediately. The liquid was having an effect on her breasts, it made them start to feel heavier and a little bigger, like they were starting to rapidly fill up with something. She soon got her answer as to what when after 6 minutes of continues fucking…
SPLURT!!!
Subaru cummed inside her making her orgasm as well making her release not only fem cum but also making her breasts squirt out streams of their milk. Subaru released her mouth from his and in an instant his mouth was on her leaking right nipple drinking her milk. Emilia moaned anew as Subaru gouged himself on her rich, thick, creamy, filling, vanilla flavored milk. When he felt he had drunk enough from the nip in his mouth he moved to the other one.
After milking both of Emilia’s breasts for 3 full minutes, Subaru removed his cock from Emilia’s freshly fucked pussy and turned his eyes to his other girlfriend Rem, who had been doing as she was told and masturbated the whole time he was fucking her sister girlfriend.
Subaru beckoned Rem over and once she got there he said: “I want to fuck you from behind Rem so sit on my lap back facing me.”
Rem did as she was told and turned around, lined up his cock with her soaking wet cunt as she sat on her beloved hero’s cock impaling herself on his 12-inch mighty phallus. She, like the other two, wailed as a third blood stain formed on the futon, proof that she had given her chastity to her hero. Subaru moaned as he almost came from entering Rem’s cunt. It took them a minute before they started to move.
PLAP! PLAP! PLAP!
Rem: “So good! Rem loves her hero’s cock! Rem is so happy! Finally Rem is one with her hero! Rem is finally one with Subaru!” Rem was on cloud 9. Not only was her hero and her finally having sex, but she could somehow tell that the two were perfect for each other in the sack.
PLAP! PLAP! PLAP!
He was hitting all the right spots, making Rem orgasm with each thrust of his cock into her. It was also hitting Rem’s most sensitive spot, her womb. And Rem wasn’t the only one to feel great for the pounding Subaru was too.
PLAP! PLAP! PLAP!
Rem was as tight as Beatrice was making Subaru feel amazing. Her muscles were also desperately trying to milk Subaru’s cock for baby batter to get Rem pregnant with his kids like with Emilia. Rem’s pussy had both of their pussies' best traits.
PLAP! PLAP! PLAP!
Subaru halfway through pounding Rem grabbed her sensitive C-cup breasts. Making her moan out: “More! Play with Rem’s boobs more!” Subaru while doing so decided he wanted to drink Rem’s milk too, so he bent her over a bit and like Beatrice and Emilia shoved the end of his tail into her asshole and started pumping in the fluid that made Emilia’s breast start to lactate, making Rem moan in both pleasure and excitement at her hero wanting to drink her milk.
PLAP! PLAP! PLAP!
After 8 minutes of pounding and pumping Rem, Subaru said: “Get ready, Rem! I’m about to cum! I’m about to release my biggest load inside of you!”
Rem shouted with pure happiness and glee: “Do it! Fill your Rem up to the brim with your seed, Subaru! MAKE REM YOUR’S FOREVER!!!” With that…
SPURLT!!!
Subaru flooded Rem with his baby batter at the same time as her tits spread out their milk. Subaru turned Rem around and latched on to her left nipple and started to chug down her milk. Rem gently put her hand behind Subaru’s head and rubbed the back of it in a way that was very motherly as Subaru once more gorged himself on one of his girlfriend's breast milk as his cock was pumping his semen into her womb. Rem’s milk was as thick, rich and creamy as Emilia’s and had a delicious taste of Blueberries. Like with Emilia, once Subaru felt the well was dry, he moved his mouth to the other one until it too was dry.
Once he was done milking Rem, he looked at both her and Emilia and smiled at his handy work. Emilia and Rem both had leaking nipples with the leftover milk, their pupils had turned to pulsing pink hearts like Beatrice, who had come to and was attaching herself to Subaru’s arm, patiently waiting for her turn to take his cock again. While Emilia’s stomach was already deflated from the seed Subaru had poured into her earlier, Rem’s stomach was still plugged up with Subaru’s cock leaving it still swollen with his seed making her look like she was already almost in the mid stages of pregnancy. Above their crotches was a similar crotch tattoo on Beatrice with Emilia’s being white and Rem’s being cerulean.
Subaru finally removed his cock from Rem, letting his cum finally leak out of her, making her look somewhat sad at the absence of her hero’s cock from her now thoroughly ravaged pussy.
As he once more sheathed himself into Beatrice making her own breast release their milk, he looked at his girlfriends and said: “Don’t worry, Rem. We are going to spend the rest of my birthday making love. So, I hope you two are ready for a day of nothing but me fucking you three until your pussies are permanently in the shape of my cock.”
Before latching his mouth onto Beatrice's nipple and started to suck out his foster sister’s milk. Emilia and Rem smiled like whores at this news, not that they would give themselves to any other male. They were Subaru’s women and no one else’s. As the pair thought this, Subaru was enjoying Beatrice’s super thick, super-rich, super creamy pastry flavored milk.
***
It was around 5pm. The Subaru and the three girls with him had been fucking for literal the whole day. Right now, Emilia and Beatrice were giving him a double boobjob while his tongue was invading Rem’s mouth and dancing with her own tongue. Subaru was covered in the girl’s breast milk while the girls were covered in not only their own and each other’s milk but also Subaru’s seed as well. Subaru’s room reeked of the scent of sex and smelled more like a brothel than a teenager’s room. As the four of them were continuing their day of debauchery…
*CLAP*
They all heard a loud clap that brought them all to their senses. Slowly they all separated and looked to the door of Subaru’s room to see…
Kenichi: “Damn son, I knew you would be a big eater when you awakened but I didn’t think a whole day of fucking three girl wouldn’t be enough to fill you up.” It was at that moment Subaru noticed that on his dad’s head were a pair of horns like the ones he had as he woke up this morning along with a matching tail and pair of wings. Subaru wanted to ask what was going on, but his father simply said: “I can tell you everything over your birthday dinner but first you 4 should go clean yourselves off and take a bath. You all reek like a brothel.” With that the Natsuki patriarch left his son’s room.
Author’s notes:
- After Kenichi left, Subaru apologized for what he did, and the girls all forgave him as it was the same for them as well.
- Emilia and Rem knew about Beatrice’s crush on Subaru and were planning on helping her join his harem sometime after his birthday.
- I decided to have Emilia's last name be a reference to her home forest, Eloir forest.
- Rem and Ram’s parents died in a car accident and were taken into the care of the Mathers’s orphanage run by Rosswal Julia Mathers.
- The idea for ‘Punk Emilia’ came from an image I found. Click Here to see it, Also the Image was made by GeartheLewdest and he calls her ‘Goth Emilia’ but I see it as more punk than goth. The reason I chose to go with ‘punk’ Emilia is because I liked the image, and I thought that the idea of Emilia dressing and trying to act like a thug but is still being the cinnamon roll we all know is adorable.