My Transfer Foster Sister Can't Be This Fat 3

(This story has elements of weight gain, fat admiration, and expansion. And this is based off of the series OreImo, or Ore no Imouto).

She knew exactly of the heavy loss he had. Having someone so close to him taken away just like that was too painful to imagine. She looked once more as he held her close, his eyes closed and scrunched. "Yes...I will..." She replied.

Matt looked down and saw her bright face, and kissed her on the forehead. "Thank you...Kirino...you can call me big brother any time." And he hugged her hard, feeling warm tears seep from his eyes.

She stroked his head in return, nestling her head close. "Sure thing big brother...Little Sis is here for you always."

And the oven pinged. "Cake's ready. I'm gonna grab the ice cream, you sit at the table okay?" Matt grinned as he sat up and walked towards the oven, using mittens to pull out the yellow cake, nice and fluffy.

He also grabbed the whole quart of ice cream as well.

Kirino's eyes gazed longing at the puffy delight, her patience being tested as she saw the sheer amount of ice cream

He then began to put scoop upon scoop onto the cake, the hot cake making it melt in gooey goodness. He even grabbed some whipped cream and sprayed around the top.

"Here you go Kirino! One big meal for my little super cute sister!"

"Thanks Big Brother~" With a grin that could make the coldest heart warm, she dug into the cake with gusto, her mouth brimming with ice cream, cake and tantalising flavour

And Matt sat close by, seeing her be a glutton...and he liked it.

The massive cake proved no match for the hungry girl, her hands digging into it's mass with blistering speed. Slice by slice, it was brought back down to earth, it's foundations lost in her belly. Dabs of cake and cream littered her lips, whilst her growing stomach continued to expand

Matt, who was sitting next to her, put a hand on her tummy. "Wow...you know how to pack it in..."

"Well, you can't not put effort into enjoying good food~" She replied, another slab soon filling her maw

And Matt began to rub her through her shirt, feeling her belly grow bigger with each slice of whip/ice cream cake entering her. He felt proud knowing his food was making her like this..

"Mmm..thanks~" Kirino noticed the soothing qualities of the rubs, which she prompted Matt to continue with

And Matt began using two hands, and his hands snuck under her shirt...feeling her sweet skin, tight with her eating. "Kirino..."

She moaned slightly, feeling his hands on her taut flesh. He was so soft, so gentle. He gave her quivers, her full belly feeling much less tight

Matt was allowing himself to be carried away. "Do you like this Kirino...chan." He remembered the Japanese suffixes from some sub shows he watched. He decided to apply to here.

"Mmmm...y-yes..." It was a whole new experience for for, and it oddly enough felt satisfying for her, despite the strange nature. "Yes it does Matt-Kun..."

Matt got off the chair and onto his knees, under the table, and saw her cute gut, raised her shirt...and kissed her tummy as he began to rub. "How's the cake?" He asked, continuing his kissing his sister's tummy

"Divine..." She muttered, still working hard to eat the whole mass. "One of the most wonderful things I've ever tasted..."

And Matt continued to kiss, and even lick a little. His hands traveled to her love handles and fondled them. "And I will give you the best things to taste...little sister..."

She knew never someone could have such a touch. Every movement of her belly on his hands could be felt, her entire body buzzing in excitement. "That would be the most lovely thing....thank you Big Brother..."
He grinned, kissing still and his hands moving back and settling on it's prize. Her bum, her sweet sweet butt. He groped it through her short shorts.

"Looks like your tummy isn't the only thing bigger..."

Initially, she was caught off guard. She gave a gasp as his hand sunk into her rear. She soon felt the same pleasure as before, the softness and care of his fingers. "My shorts did feel tight..." She remarked, almost breathlessly.

"Keep em. In my opinion, they're super cute." He said looking up at her. He rested her head on her belly. "I can hear your tummy...it's cute." He said, listening to her gurgling gut as he continued to massage her ass.

"Surely I can't still be hungry..." She thought aloud. Kirino began to feel fullness slowly kicking in.

He then stopped, crawling out under the table. He saw the cake almost gone. "Wow. You're almost done."

She glanced at the table, seeing the last few pieces of cake. "Over so soon..."

"Oh?" He smirked, hugging her from behind. "You wanted more where that came from lil sister?" He asked, hand patting her tum tum.

"It’s so strange...I feel so full but it's like my mouth is in control, telling me to taste more."

"Well then," He smiled. "Want something else to eat, or is your big tummy too stuffed?" He asked, rubbing it from behind and kissing her head.

Cramming the last few slices into her mouth, she swallowed and looked down at her buldging tummy. "I think...I could go for a little extra.."

"I still have some ice cream left. I'll make you some milkshake." He said standing up and leaving her be. He walked over and began preparations.

Kirino lay sitting on the chair. Her shorts pressed into her gut, as it hung across the waistband. It stuck outwards by a fair amount, her navel at the furthest point  of the expanse. It hung out from her shirt slightly too, enough to see it hang over her shorts.


Matt began to work: getting out the blender and putting in ice cream, milk, and ice into it. He has kept the ingredients out however...

And he began to blend the shake. "So Kirino, how do you like it? Your tummy that is."
She gave her engorged belly a few rubs. "It is a nice feeling...having so much inside. Makes my belly feel so soft and smooth...Not to mention all the rubs..."

Matt smiled. "Glad to hear it. Well...we can make it bigger." He commented. "And softer. You want that?" He asked as he continued to blend.

Kirino thought about it. Being bigger...there'd be so much more to rub. And with all the foods she still wanted to try, no doubt it'd grow and grow. "Yes, I'd like that. I'm enjoying this so mch, there's no reason to stop, right?"

"Alrighty then. Wanna track your weight as well? Take pictures of your progress?" He asked as he finished, the cookies and cream milkshake complete. He removed the pitcher from the blender and took it to Kirino.

"That sounds like a good idea...to think how far I'll go. It's almost scary thinking about it" She grabbed the shake and took a long sip. "Wonderful~" She uttered before continuing to drink.

And Matt sat by and waited for her to finish chugging. He needed to make more milkshake after all.

And a hand went to her tight tummy and began to rub.

It was cold to the touch, the shake filling up her already full stomach. His rubs continued as Kirino finished the last drops. "Such a combination! How do people find these?" She marvelled, having clearly enjoyed it.

"We americans have our methods," He smiled taking the pitcher to make more shake. He then began to blend once more. "After all the shake is done. We will do a weigh in and picture. Sound like a plan?"
"It'll be a good start." She replied, awaiting the next shake. "Are you sure you'll be able to keep paying for all of this...you've been treating me an awful lot."

"You're underestimating the wealth of my mom and dad," he said with a smile. "And besides, I have some money for inheritance myself. And anything for my little sister." He winked. The shake was almost done.

She smiled in return. "Big Brothers always need to look after their Sister~"

Matt chuckled and the shake was finished. He returned with the pitcher in hand and sat down. "Kirino-chan, can you...sit on me while you drink this?" He said blushing.

"Why of course! You've been so nice to me, it's only fair you get something in return~"
She took the pitcher from him and began to sit, her growing rear in the tiny shorts atop Matt's knees. He could feel those extra pounds as she sat.

"Mmmm..." He groaned, his hands going to her thighs. "We have to do this more often. I'm beginning to love your growing girth more and more..." He said kissing the back of her head and groping her tummy.

"It'll only get better from here!" She leaned her head onto him, taking occasionaly sips from the shake.

And his hands traveled to her bum, groping it a bit. "Damn right. Especially for your plump rump~"

Kirino gasped slightly. She still wasn't used to the gropes, especially now she was getting much softer. The final parts of the shake traveled down her throat, followed by her licking her lips to catch the straggling drips. "Mmmm...all done~"

"Alright. One more." He said, patting her near pregnant belly. "Can I move please?"

Kirino did so, surprised she was getting a third. She gave her much larger gut a few pats, still tight as ever

Matt walked back to the counter and began to make the third final shake. "Is your tummy hurting at all?" He asked.

"Not yet...but it is looking sorta red." She noted the area around her navel, the skin a deep shade of pink. "I'm fine right now, so don't worry!"

"Question, where do you think this new fat will go? " He asked as he continued to blend. "Wanna guess where?"

"So far it seems it'll all go lower..." Kirino grasped her ass. "These shorts won't stand much longer already. I doubt any will go to my chest.."

"Well, can't go wrong with that booty of yours." He grinned. "There. Done!" And he stopped the blending and returned to the table. "Here we are."

Kirino eyed up the shake, grabbing it and drinking fast. The flavour was amazing to her, to the point where she didn't care about the coldness of the drink.

And Matt saw her already pregnant like belly blimping up "Your stomach really is a black hole you know that." He smiled

"I'm surprised myself...I never knew food could taste so good or that I could pack away so much..." Downing the last shake, Kirino held her ice cold belly and sat down. "Oooh...I think that's my limit for today..."

"Me too. Especially with all the fast food today?" He took her hand. "Come on, let's go weigh ya and photo ya." He said. "Scale is in my parent's bathroom."

Heaving her legs upstairs, Kirino made her way to said room. She sat down on their bed, hearing the soft gurgles of her stomach.

Matt brought the scale to the bedroom and whipped out his camera phone. "Can you stand on pose? I'll do a front, back, and side shot."

"Yeah, sure thing." Getting up, Kirino stood in shot. She was pretty used to camaras, even with the added pounds she felt confident. She made sure to give off a cute smile to go along with it

And he took the photos. One from the front, one from the side, and the other from her behind.

"Okay Kirino-chan. Do you remember your last weight?" She asked

“Last time I remember I was 105 pounds. I'm pretty sure."

"Okay then." He made a note of that in his phone. "Okay...step on Kirino."

She obeyed, stepping on and watching the numbers roll along the counter. Her and Matt's eyes were focused on the number that appeared.

"hmmm..." The needle stopped at...

"112? That much!?" Kirino was shocked. She knew she'd gain, but that fast in only two days?

"7 in 2 days. That makes for...21 in six days. Just under 25 a week." He pondered. "Not bad!"

"If that's how fast it'll go I'm going to balloon up in no time..."

"a very cute balloon." He smiled, going behind her and hugging her, hand on her tummy and jiggling a bit. "You almost look pregnant~"

"H-Hey...don't get any ideas!" She spluttered.

Matt chuckled and gave her tummy a pat. "Well anyways. I'm gonna focus on getting ready for school. Tomorrow is your walkthrough registration at the high school. But with that nap I doubt your sleepy. If you'd like..."

It was true, she didn't feel sleepy at all. It was getting late yet she had desire to rest. "I'd be glad to hang around with you for a few more hours~ I can sit down and give my belly some time to digest" She gave a few rubs.

"True. Maybe watch some anime? Or show me those...visual novels?"

"Well, we can do either of them....I've got plenty of VNs that I brought with me! So many to try~"

"Like what are their titles and genres?" He asked as he placed his phone away.

"Well, there's romance, comedy, comedy romance..."

"Those sound good. What are the shorelines?" They exited out of the room

"Hmmm...I can't decide!" She drooped down slightly. "I couldn't settle for just a few, I like them all just as much! If you could pick one you think is good, that'd be okay." Her mouth scrunched into a slight sad frown.

He shrugged. "Okay then. Can you name me the titles and what the stories are about?"

"Well, a one I enjoy is Destiny Panzer. It's all about a highschooler trying to make it big in the world of Tankery in an oppressive female world. It's got some stratigic stuff about riding tanks, plus it's possible for you to change which girl you end up with in the middle of a route! Then there's Fantasy of the Mind, where a girl creates her very own world in her mind and gets her friends trapped inside! It's got plenty of humour and almost every route leads to some Yuri action! Plus, they've both got at least one Little Sister route in them, the Kirino seal of approval!"

"So one about a guy in a world where girls ride tanks for cars, and another has lesbian overtones to the extreme and is a Wonderland hybrid." He pondered. "How about Destiny Panzer to start?" asked Matt looking down at the chubby blonde

"Oh, it's great! He tries to sneak into the Girl's Tankery class, where he ends up falling into a Tank the best team in the school is using! The amount of fanservice in that one scene is amazing..."

Putting the disk into her laptop, the screen flickered to the title screen. As things started, Kirino's face drooped to a grimace. "There's....no room for a save file...I...have to delete one of my saves for a new game…” She looked on at her various 100% completion files, all of them adorned with shining medals as a token for completing objectives. "I'm sure it'll be fine if we play another VN...right?" Kirino gave a false smile, panicking on the inside.

"Uhhh...sure. We can play another VN." Matt said patting her head in reassurance. "Got anything else? So," He sat on the bed. "Got any fantasy titles?"

Kirino sighed very obviously. "Well...I've got a really good one where the world has been taken over by this demonic beings that have awoken. You have to find team members to try and defeat the bad guy. It's sorta serious in it's tone, but the H-scenes are oh-so worth it, plus it adds some really cool RPG stuff you wouldn't expect at first! Plus secret endings galore!"

"That sounds fun!" Matt said, amused. "Just so long it doesn't have like, Cthulul having his way and stuff. I heard some...odd things about fantasy japanese pornos..." He scratched his cheek a little. "So, load it up!"

Booting the game up after inserting the disk, the game was set in full swing. Though Kirino did say she'd let Matt play the game, most of the time it was her taking over and chastising him for making wrong choices.

"What!? What made you think hiring some flimsy mage is a good idea for your first party member! You'll need a lancer to get through here..." She grumbled. "She's not even the best girl..."

Matt looked back at Kirino. "Well with a Mage she can provide heals, as my character is a main tank. I'll get the DPS I need later. Besides," He shrugged. "The mage looked like she needed to be protected! Can't leave her alone can I?"

"Of course you can! She's got a typical angst backstory and she has the least amount of h-scenes in the game! She's clearly not worth it."

"Noted. I will be sure add another girl come the next time I need a party member," he shrugged.

The game continued, both of them engrossed in the contents. Matt's mage had proven to be a wise choice, her level ups giving her greater healing spells and more health in total. She was even able to survive moves that would normally instantly kill her. Kirino folded her arms and pouted as Matt gave the boss of the area what for with his mage's fire strike.

Matt grinned. "See? Survivablitly is everything in Fantasy games" He said wagging his finger. "So, when do I add the next party member?" He asked comfortably. 2 hours so far has passed

"Just about now..." She muttered. "Make you sure choose Lancer or else you won't stand a chance against the Weapon's Factory boss"

"Gotcha. What other classes are there to choose?" He asked as his character and mage walked into the tavrn and the choice to choose has come!


"Archer, Necromancer, Warrior, Assassin, Bard, Gypsy" She listed in quick succession. Her pout remained in place. "If you choose Gypsy, I'll erase this save" She threatened.

"And...what are they like? I can see that the Lancer is a bit on the short side, but I would like a little run down on the other classes. Is that Archer and Assassin elves?" He asked.

"Eeesh, whats so bad about the Gypsy?" Matt asked eyes widened.

"Worst girl. Plus she's like Mage but less heals and more support. Barely attacks."

"Noted. Won't choose her then. What makes her worst girl?" He asked, cursor hovering over the Lancer and Archer.

"She's just boring. Not very pretty either. Lancer is best girl easily. Plenty of attack power and very fast so she attacks lots. Archer and Assassin are opposites. Archer is slower but great at long range. Assassin is quicker but only used close range."

"Gotcha. Lancer it is!" Clicking on the girl, and she was added to the party. And info like with the mage popped up, showing her stats and...

"Her three sizes? Huh, she's smaller than the mage." He commented.

"Yep. Memorise them. You get quizzed on random things later on in a area and that's one of the questions about her sizes. They're all personal questions about the party members. Answer too many wrong, you can't enter that area's dungeon plus your part members leave because they're mad you don't know anything about them."

"Oh wow." His eyebrows go up. "You Japanese sure put a lot of thought into these games. Okay, let's write them down on a notepad so we can have them on hand." He reached for a piece paper and began writing down the Lancer's name and three sizes.

"So, where to next? I have mage and melee dps."

"Try going into any of the three woodlands. All three of them have hidden merchent shops which prove very useful later on. Plus you trigger bonus scenes in theme that can lead to the good ending."

"Gotcha, going to there before the weapon factory boss it is." And he guided the party along...and as they crossed the plains wind blew hard and exposed...

Some very nice and modern women's undies.

"wow...nice..." He commented, seeing the Mage's shyness about it and the Lancer being infuriated

"Oh yeah, each girl reacts diffrently to events. Some of them like it, some of them don't"

"I can tell."

"The game actually tricks you into thinking Lancer is a tsundere. If you act like she is, she'll leave the party and you'll get an automatic bad ending no matter what. Try and make up with her in that bonus cutscene."

"Okay...when is it coming up?" He asked as they progressed, the party taking down some monsters and bandits as they arrived at a camp site.

"Near the end of the forest, go left instead of right then cut the bushes by the rock. You'll get to the hidden shop and you'll trigger the cutscene." He nodded and they progressed through the forest...

The girls then fell through a trap door of sorts, and they landed in a spider's web! Once again, their dresses or skirts were revealing once more. Matt had the player character leap down and engage in a one-on-one mini boss fight. It was tough but they prevailed.

"Well that came from nowhere.”

"Yeah, the game likes to do that with you. Plenty of secret things you don't expect, but the rewards are all worth it. You'll get a crap ton of gold for that."

After saving the girls, they both expressed their thanks and gratitude, Mage admitting she was scared and Lancer denying she was.

Matt chose the option to believe Lancer, and the party moved on through the forest.

"You're getting there finally. I thought it take you the whole game to get things right!"

"Hmph." He shrugged. And then he turned left as instructed by Kirino and the cut scene began.

"What sis, what do?" he asked smiling as the mage and Lancer began talking.

"You should focus all on Lancer, since you pissed her off. Mage already has a strong relationship, she'll be fine."

He nodded, choosing the choices involving Lancer. Lancer was saying why the player character would go so far to put himself in danger, for she can handle herself.

"Because you're my friend.”
"I don't want you to suffer.”
"Because I love danger!"

"first or second option?" He looked towards his sister.

"Go for the second option. Her level is low, so don't go right into the deep end just yet"

Matt nodded, clicking on the second option. Lancer blushed a bit, and called the PC a wannabe saint...but she did utter thanks. Followed up with some background dialogue and the cutscene ended with Lancer smiling a bit. "There we go. Now you're on your way to a good ending for sure!"

"Glad to hear it!" And the party exited the forest and came across a giant coastal port town, and in the distance a giant factory. "So, what next?”

"The town has plenty of good stuff in it. Stock up and then just do whatever until you can reach the factory. You'll need all the exp you can get.

"Okay, let's head to an inn, heal up, buy stuff, and head to the factory." And they looked around, seeing the people in poverty a bit. "So why do we need to go to his factory boss?"

"If we beat him, the people will see us as heroes, meaning they'll show us the way to the next country. Plus they'll supply us with extra MP items"

"the logic is sound. Come, let us throw down the Bourgeois!" He called out in jest as the party made their way to the factory...but they couldn't get in.

"Let me guess, we have to go through the sewers."

"Hope you like Mutant monsters! Seriously though, they give you poison with every attack."

"Lemme see if Mage has status recovery....and she doesn't. Time to head back and buy antidotes."

Just a heads up, don't mess up here. Just don't. For some reason, they decided it was a good idea not to add any checkpoints for a while. Die and you go right back to the previous town."

"Tch." Matt rolled his eyes. "What, they wanna emulate the Depths from Dark Souls? No sweat." He cracked his hands and got to work. He heard Kirino's tummy rumble. "Food's downstairs if you want to bring some back up, sis." He added in a small wink at her
"Sure thing Big Bro~" She gave a warm smile as she headed back downstairs to raid the cupboards once more. She was able to spy some popcorn, which she began to heat whilst spying any chocolate she could find.

Once the popcorn was ready, she scooped it into a bowl and carried her snacks with both arms as she headed back up. As she entered, the game showed Matt attempting to fight off hordes of strange distorted monsters. "Try to go long range for them. They'll steal your weapons if you melee them."

"I figured. Slimes with weapons sticking out of them," he commanded the Lancer to do something of a throwing knife attack, followed with an AoE attack from the mage. "Tend to scream 'don't hit with melee'. I just have the MC using buffs all around the party."

Matt looked back at her, seeing her pink shirt and blue booty shorts. "Say...I did some study in otaku culture and found something called 'costly'. You know of that?"

"Costly?" Kirino mused inbetween handfuls of popcorn. "Pretty sure you mean about Cosplay, right? Cause I can tell you aaaalll about that. Come on, that's a pretty basic mistake you're making there. I'd expect more from someone with such superior tastes in anime."

Matt hit his head. "Slip of the tongue, my bad. Hehe." He smiled at his own goof up. "Well, care to tell me. The pictures I've seen are mostly...half in half in terms of quality cosplayers." He looked to the side, scratching his cheek. "Do you do cosplaying at all?"

More slimes and rotten rats slain.

"I've never really done much myself. I've worn a maid outfit on occasion and sometimes a photoshoot would be something like gothic, but nothing like you'd see at a con or anything. Mostly money and time issues, y'know?" She casually shoveled chocolates into her mouth. "Huh, killed those slimes fairly well. They're a pain for me, what kind of magic did you use on them?"

"I bet the money to try to get those costumes would be costly..." He mused. "What about outfits you see in those...Slice-of-Life shows? Like...schoolgirl outfits, those unique schoolgirl gym uniforms and swimsuits?" Matt had a blush on his face asking this.

"Fire magic. I had Lancer use stunning daggers while Mage wraps up with Fire spells. Very easy. So, is there a boss in the Sewers or is there a checkpoint at the end before entering the factory?"

"Yeah, tends to cost quite a lot. Surprised to see so many Cosplay and Maid cafes stay open so long..."
"But yeah, schoolgirl cosplay is super easy. But I never do it. Not much of a challenge since most uniforms you see in shows are pretty easy to replicate. Swimsuits and Gym Uniforms just require a raid through the Gym.Of course, the appeal is easily there. What with the specific costume fetishes and the short skirts. Maybe if there was a series I'd REALLY enjoy....Say, are there any cons coming up over here soon?"

"Shame maid cafe's wouldn't work over here in the states. We'd have too many creepy old men and feminists going berserk." He added.

"I'd love to see ya maybe in some, if that's not too much trouble. As for the cons I'd have to check. Maybe Anime Expo in LA." He mused as the party finished and got out of the Sewers into the lower factory...and there was a check point!

"You did that in half the time I did it!?" Kirino stared at the screen in disbelief. "It's only your first time too!" She wasn't doing a very good job at hiding her jealously

Matt grinned ear to ear. "Dark Souls prepared me. Most RPGs nowadays are easy as cake."

"I've only heard about the game because Famitsu liked it. Is it really that hard? Didn't look like much to me... Maybe if you had a copy with you..."

"I died over 50 times total in the game," commented Matt dryly as he saw her finish the popcorn.

"And I do have a copy for my PS3 if you're interested in playing. But note, it's really hard and unforgiving."

He gave out a yawn. "I think now is a good time to stop right?" He asked. "We can tackle that factory boss tomorrow. It is getting late, and I do have Junior college tomorrow, and you have school so I will drop you off. Want some dessert?"

"Oh sure!" Her eyes lit up in the middle of eating a sizable bar of chocolate. "Mentioning cake did get me interested in some....Plus I wouldn't worry about it being hard. A seasoned gamer like me should be able to handle it!"

"Want me to bake ya some big girl~" He cooed, rubbing her thick thigh a little. "If you say so~" He clicked save and turned off the game, standing up and waiting to go downstairs with his new little sister.

She giggled as he rubbed. "That'll be an understatement soon....I can't even begin to think how big I'll get...But the food's good either way, so no problem right?" She finished the last of her chocolate, licking some melted morsels from her fingers.

Matt nodded. "Yeah, tonight we should do a weigh in and some pictures. Maybe make a power point slide show showing how small you once were. Of course, it'd have to be in clothes for you to grow out of. Like your sexy booty shorts or that nice T-shirt you got." He threw her a wink.

"Okay, let's head downstairs. One nice big batch of cake for you, coming right up!"