Chapter 4: Celebration

As the two go to Kurumi, she begins to feel more and more nervous. She couldn't believe that this is finally happening. Her sweet, innocent little brother is about to have sex with her.

Although she feels excited at the prospect of it, she didn't think that it'll happen while their mother is also here. Let alone after both of them had sex minutes prior. 

Kurumi, distracted by her thought, was snapped out of it by something long and hard slapping her face. Looking up, she felt her face heats up as she realized that the thing slapping her is Kesuke's cock. 

Licking the tip of it, she can taste the cum and juices of their mother mixed together.

"Oh...!" Kesuke couldn't help but moan in pleasure from the sensation of his twin soft tongue licking the tip of his cock.

"That tastes good..." Kurumi commented on the taste of Kesuke's precum. She continues licking the tip of his cock, lapping any precum that comes out.

 As she licks it, she feels it getting bigger and harder. It only makes her want to lick it more. What she didn't expect however is his twin grabbing her twin tails and slamming her face against his pelvis.

'URGH! 'Cough' 'Cough' Kurumi coughed and gagged as she found herself unable to breathe properly as it is now blocked by her brother's cock. It weirdly made her more aroused than before judging by her more vigorous sucking of her brother's cock.

"I knew my sister is a masochistic slut!" Exclaimed Kesuke, noticing his sister's sudden spike in arousal. "Don't worry sis... I'll make sure to make it rough."

With that, Kesuke continues to use his twin's mouth as nothing more than a fleshlight, occasionally allowing her to breathe a little bit while Kurumi seemingly getting wetter by just hearing her brother humiliate her.

All the while, Mitsuko, laying down on the tile floor, is furiously masturbating. Her seeing his thought to be an innocent son dominating his blood-related twin made her more turned on than before. It was wrong on so many levels and yet it was right at the same time.

"Ahh! Ahhh! Sis... I'm gonna cum!"

Kurumi doesn't stop licking his cock, even though she knows what's coming. Instead, she continues to lick his cock, which made him release his seed into her mouth.

"AHHH! Take it all sis!" Shouted Kesuke, his hands holding her head near his hip, making his dick go further down her throat.

'Gulp' 'Gulp' Kurumi gulps down his cum, enjoying the taste of his sperm mixed with her saliva. She tries to swallow all of it but soon found herself spilling his cum from her mouth and nose.

As he almost finishes cumming, Kurumi lets go of him with a wet pop, letting a few remaining ropes onto her face.

Kesuke looks at his sister and the sight of her face covered in cum, trying to inhale as much oxygen as possible. Looking down,    he can see her glistening pussy wet. Looks like his sister has just had an orgasm by giving him a blowjob.

"Now... Let me return the favour sis." Without pause or giving his sister a break, Kesuke pushes her down and begins eating her pussy.

"Oooh!"

Kurumi moans in pleasure as her brother eats her out. She enjoys the feeling of his tongue exploring her slit. He soon finds her clit and starts sucking it, making her back arch back at the sensation.

"My, my... I feel left out. I'm almost jealous~" The voice of their mother rang out. "How about you take care of me Kurumi-chan."
Before Kurumi could reply, her mouth is soon overtaken by their mother's pussy. Still covered by their earlier act of debauchery.

"Uuungh~" Kurumi moaned as she ate her mother out. Lapping up any remaining cum that is slowly dribbling down.

"Mm... that's good baby~"

Kurumi continued licking her mother's pussy until she climaxed. She then stops and kisses her mother on the lips.

Kesuke meanwhile is pounding his sister relentlessly, the sight of his sister eating their mother making him more aggressive. He sucks her clit while fingering her. Kurumi feels her orgasm building up.

"Ahhh! AHHHH!"

Kurumi's body shakes uncontrollably as she and Mitsuko orgasm, letting out her juices into Kesuke waiting mouth while at the same time drinking her mother's juices. 

Panting, Kurumi could feel something big trying to enter her virgin pussy. Looking up, her brother is smiling at her, his cock already lined up.

"Ready sis~?" Asked Kesuke in a very sensual tone.

Kurumi replied without any hesitation whatsoever. "Y-Yes!"

With that, Kesuke penetrated her deep with a single hard thrust, easily breaking her hymen and making her pussy leaks blood a little.

"AHHH! Yesssss!" Kurumi can't help but cry out as her brother fucks her, the pain of her first time easily drowned out by the pleasure she is currently experiencing. The feeling of her brother entering her again is indescribable.

"Nn! Nngg...!" Kesuke grunted as his sister's hole is even tighter than Mitsuko's. "You like it don't you sis...~?"

"Mm! Yes!" Was the only reply Kurumi could muster as she could feel her mind going blank.

As he continues to fuck his sister, he also took the opportunity to play with her big breasts, pulling and sucking on them just like what he had done to their mother. His sister seems to enjoy it too.

"A-Ahh! Uuuh! Mm! More... I want more!" Incoherently moans Kurumi.

"Good girl... just keep doing that."

As they feel their orgasm approaching fast, Kesuke's thrust became faster and harder.

"I'm cumming sis..."

Kurumi can feel her brother's cock throbbing inside her, ready to shoot his load into her waiting womb. The possibility of him impregnating her makes them reach their climax.

"Ahhhhh! I'm cummmiiinnnnnggg!" Kurumi screams as she cums along with her brother, their juices mixing together as they both reach their peak. Rope after rope of fertile semen flooded her insides making it warm. All the while, Kesuke is still thrusting in and out of her, trying to reach deeper and deeper into her. Not only that, but Kurumi's pussy seems to also clench hard on her brother's cock in order to milk them.

As their orgasm begins to subside, they looked at each other. Their eyes were now only filled with intense love instead of burning lust.

Kesuke went forward and captured her lips, inserting his tongue into her mouth. Kurumi tries to futilely dominate his tongue as they both make out.

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"My, my... That was hot you two but aren't you both forgetting what today is~?" The voice of their mother rang out, making Kurumi and Kesuke stop.

As they try and remember what today's event is their expression went from confusion to panic.

"Our birthday!" Kurumi and Kesuke exclaimed at the same time. In all their heat of passion and debauchery, they had forgotten that today is their birthday and that some of their friends will be coming to celebrate with them.

In a hurry, both of them grabbed their mother and dragged her into the shower with them to quickly clean themselves of the mess they made. This time, they managed to control their urges even when Mitsuko tries to make them give in by shaking her butt and sexually rubbing her body against Kesuke.

After they are done cleaning themself, Mitsuko goes into her bedroom to get dressed while the twin also does the same. Just as they finished dressing, the doorbell rang.

"We're home!" The voice of his two older sisters, Souko and Sayoko rang out, signifying their return.

"Souko-nee-chan! Sayoko-nee-chan! You're back." Greeted Kesuke as Kurumi and Mitsuko finished dressing and went downstairs to greet the rest of their family.

"Fufu... Of course... We wouldn't want to miss our favourite cute little brother's birthday now don't we." Teased Souko, petting his head. Her hand holding what looks like a cake.

Kesuke pouted, "I'm the only brother you know."

"We know," Sayoko said. She then went into the kitchen to begin setting up their birthday.

"How's your day Kesuke." Asked Souko. She and Sayoko noticed their brother's change in behaviour the moment they entered the house.

"It's great. Kaa-chan, Kurumi-nee-chan and I had lots of activities together." Kesuke replied much to the amusement of Mitsuko and the embarrassment of Kurumi.

Before any question could be asked any further, the doorbell rang again. Kesuke goes to answer the door. As he opens the door, he is suddenly hugged by someone familiar.

"Saki-chan, you came! Miss Yuko too." Exclaimed Kesuke. Happy seeing one of his and Kurumi's childhood friends and her mother. For as long as he can remember, Saki Yoshida and her mother, Yuko Yoshida have always been close to the Souma household. Ever since Yuko's former husband was caught by the police almost raping Saki when she was only four, she and her daughter had moved out of their old house and became their neighbour. Thankfully, Saki didn't develop any trauma associated with it and ever since Mitsuko introduced Kurumi and Kesuke to Saki when they were five, they had been friends ever since.

"Of course we came... And not just us." Kesuke then looked behind her and found their other childhood that is the same age as them. Tomoko Kuroki and her little sister, Tomoki Kuroki.

He and Kurumi had met her when they are ten. He was the first to introduce himself and his sister when he notices her alone during class, much to her sister's jealousy. At first, Tomoko couldn't even speak to him without stuttering. Over time, after countless days, she manages to hold conversations with him without any pause or stutter and although she is still what one would call shy and weird, she gradually opened up to him and even became more cheerful.

One day, Tomoko had invited him to her family's house, which is close to his, to have tea together with her family together stating that they wanted to see who had managed to 'change her'. She of course invited Kurumi and Saki, who she had managed to befriend on her own, too.

To this day, he still remembered that day as if it was yesterday.

[Flashback]

"I'm home! I've brought my friends too." Yells an excited Tomoko as she and her friends enter the house.

When Kesuke first enter the house, he was greeted by the sight of someone who looks similar to Tomoko.

"Hello. I'm Kesuke Souma."

"Hello, Souma-san. I'm Tomoki, the little sister of nee-san. Nice to meet you."

"My... So you're the ones who managed to befriend Tomoko-chan. Nice to finally meet you." An older woman who has the same jade eyes as Tomoko introduces herself.

Kesuke also noticed what he presumed is Tomoko's father analyzing him before giving him a nod of approval much to Tomoko's embarrassment.

After having tea and chatting up with her family, Kesuke, Kurumi and Saki went home.

{Kuroki Household}

"Tomoko-chan, you didn't tell me your friend is a boy~. A cute one at that." Teased Mrs Kuroki. She had always thought that Tomoko's friend who had managed to change her daughter for the better is a girl. Yet, it was a boy even though Tomoko would often time be completely shy whenever a boy even walks near her. Though, the way Kesuke's sister looks at her brother is weird. "Make sure you don't let him out of your grasp."

M-MOM! What are you s-saying... We're just friends... yeah just friends..." Tomoko didn't know why but she could feel her heart ache when she said that.

"Yeah nee-chan, he seems like a good person." The voice of Tomoki said. After a few minutes of talking to Kesuke, Tomoki definitely would not have picked any other person other than Kesuke to look after her big sister. Unknowingly, in the future, Tomoki would also be smitten by Kesuke. For now, they are just friends.

"What about you, dear husband? What're your thoughts about him." Mrs Kuroki asked her husband.

Mr Kuroki simply replied, "I approve." That reply did not help Tomoko with her embarrassment. In fact, it only fuels it further.

That night, the Kuroki Household is filled with laughter as they continued teasing Tomoko with her eventually giving up trying to stop the teasing and laughing with them.

{Flashback End}

Ever since that day, they were always seen together. Their families would also invite the other, if they have free time, making them even closer to each other.

A wave of Tomoko hand's snapped Kesuke out of his thoughts. "Sorry Tomoko-chan. Lost in thoughts for a second." Kesuke apologises, patting her head even though he is only a bit taller than her. "Good to see you too, Tomoki-chan." He greeted the reserved girl unable to pet him due to her being taller than her big sister and him.

Smiling at the petting she is receiving, Tomoko nodded her head, accepting the apology. "Mom and dad couldn't make it tonight,"

"Don't worry about that, Tomoko-chan. Come in, we are almost ready." Kesuke welcomed them.

That night, the house is full of celebrating., cake eating and other fun activities. Although, they did notice Kesuke's personality change. Not only that, Kurumi would sometime blush up a storm whenever they were close to one another making them a bit suspicious. Nevertheless, it was a great time all around.

 

Hope you like it.

AN: Yes I did add Tomoko and gender-bent Tomoki from Watamote. And yes I did change their personality. And yes, Saki's mother will be different from the Emergence. Like I said, this will be AU a bit.

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