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Hizashi began to fatten up Shouta during their last year of UA.
He had noticed that the other boy was less grumpy and haunted looking when he was eating, so Hizashi did the only thing that made sense at the moment and made sure that his friend was eating basically 24/7.
The more sugary and the fattier the snack, the more content Shouta seemed to be. So Hizashi supplied him with melon bread, dorayaki, various flavors of pocky and other sweet snacks during school.
During school lunch, the new head chef Lunch Rush was requested by Hizashi to make Shouta meals such as deep fried pork katsu with a thick butter roux, tonkatsu ramen with rich fatty broth and generous slices of pork belly floating on top the noodles. Other more foreign dishes were gradually added to the rotation, such as American style beef burgers and cheesy fries, deep fried mozzarella sticks with a flight of dipping sauces and heavy creamy treats, cheese cakes and various mouses and custards. The quantity and richness of which gradually increased over the many months of Shouta forcefully stretching out his stomach capacity.
Outside of class, they became regulars ate a local crepe cafe. Hazelnut chocolate, ripe strawberries and sweetened condensed milk topped the thin, doughy wraps. Chopped nuts, whipped cream and caramel sauce sweetened the deal. Hizashi made sure that Shouta polished off at least two of the desserts every visit, upping his requirement to three once Shouta told him that he was no longer stuffed after just two.
The two of them never addressed what they were doing to Shouta. Hizashi never outright told his friend that he was purposefully plumping him up as a fucked up form of therapy. And Shouta never told him 'no', 'stop', or 'I don't want this'. He only opened his mouth and allowed Hizashi to stuff him fatter and fatter.
All the calories had to go somewhere, and that somewhere was primarily Shouta's hips and rear end. Oh, he developed a belly, and some bouncy tits, but it took less than six months of stuffing his face for his thighs to rub against each other and for him to develop a slight waddle. Hizashi watched as his friend swelled with fat, fat that HE was filling him up with.
There was a sense of pride that Hizashi held when he heard Shouta tell him with a chubby, flushed face about how his wide, jiggling hips were beginning to brush against tables, nearly knocking items over. How his parents looked at him with concern as their only son ballooned into obesity in less than a year. How he had had to go many sizes up in uniform already.
Hizashi watched as Shouta began to touch himself, whether in concern or awe he wasn't sure. Rubbing at the sides of his seam straining thighs, cupping the side of his drooping paunch and when he thought no one was looking, pinch at his more tender, intimate fat.
It made sense that he was curious. He was only half his current weight a mere eight months ago. The guy must've still been getting used to his new body and how he carried himself.
It made Hizashi curious too.
"Come on, dude. Just for a few seconds!" The skinnier boy had pleaded.
"It's so weird." Shouta had refuted, his plump face a bright red. "I'm not just gonna let you grope me." His hands covered the crest of his belly protectively.
"Don't word it like that," Hizashi whined. "Just consider it… Paying me back for the cinnamon buns from yesterday!"
"But we're at school," Shouta hissed. "Someone could see us!"
"There's literally no one here."
"But-!"
"I'll make you a cake if you let me." Hizashi wiggled his eyebrows.
Shouta's expanded stomach, already hungry despite having just had lunch only two hours ago, growled in agreement. "Fine. You can… touch me." He looked away in embarrassment.
"Cool." Now Hizashi was the one to hesitate, not really expecting that he'd ever get this far.
Long, thin fingers brushed against Shouta's button up shirt, the buttons gaping as his fat belly pressed outwards. Hizashi pinched at the taut fabric before tugging it out from its tucked in position.
Shouta had long since stopped being able to wear belts with his uniform, allowing his hefty gut and wobbling hips to hold his pants up. The waist of the slacks cut deeply into Shouta's stuffed belly.
Hizashi quickly undid his friend's pants button and zipper, allowing his belly to spill out over the front of his thighs.
"Damn." Hizashi whispered. "You uh… You've gotten big."
"And -huff- who's fault is that?" It was the first time either of them had acknowledged what they were doing to him.
"Mine."
Shouta's face was on fire. "Yeah…"
Hizashi stepped closer to Shouta and cupped his lower belly fat with one hand, while he pressed his other into the fatter boy's swollen hip and squeezed.
"Nnnng!" Shouta couldn't help but whine as his fat was explored. "Hurry u-up, idiot."
"You're so soft, Shou. Look at you, you're oozing between my fingers."
And he was. Shouta's fat was incredibly soft and malleable, the texture encouraged by his gluttony, hedonism and unhealthy addiction to food.
"No, I'm not." Shouta had to bite his lip to keep from moaning as Hizashi pinched, squeezed and weighed his blubber in his hands. It felt scarily good to be played with like this. Like a toy.
"Suuuuure." Hizashi chuckled. "Hey, lemme see something." He grabbed the sides of Shouta's pants and pulled them down in one swift tug.
"Wha-?!"
Hizashi watched in awe as Shouta, now completely bottomless took a staggering step back. The movement caused his lower body to wobble hypnotically, the shelf of his massive ass continuing to move even as Shouta himself stilled. "Bro, why aren't you wearing underwear?"
Not that he was complaining. And besides, Shouta's drooping belly fat hung down far enough to cover anything important.
Shouta pressed his hands into his middle, unsure what to do with himself as he let his best friend ogle his half-naked, obese body. "I'm… too big for underwear now," he muttered, embarrassed by the results of his greed.
"Fuck man. That's kinda hot?" Hizashi had no filter.
Shouta's red hot shame was no match for the heat that was starting to grow in his lower half. He could feel himself stiffen. He was pent up, as it was much harder these days to reach his cock now that it was buried in his rapidly growing fat pad.
Hizashi continued despite Shouta's silence. "Can I… keep touching you?"
Shouta didn't want his friend to know just how desperately he wanted him to keep going. "…yeah. Go ahead, I guess."
Hizashi walked forward and gently pushed Shouta up against the classroom wall. His ass was so fat that Shouta's actual back wasn't able to touch the wall, as his butt took up too much room.
"You're really fat, you know." Hizashi's hands rubbed and grabbed at Shouta's lower body. His love handles, his hips, his thighs. They traced his dark purple stretch marks, evidence of his rapid, out of control growth. "And at this rate, you're only gonna get fatter."
Shouta was panting now, his double chin and plump cheeks jiggling with each inhale. "Oh god."
"And it's all 'cause you let me stuff you like the fatass you were born to be." Hizashi smacked Shouta's side to watch him quiver. "Let's be real, you're never gonna become a pro if you keep eating like you are. But you'll never stop me, will you? You like it too much."
"Ah-!" Shouta gasped as Hizashi's hand lifted his heavy belly only for his other to cup his bloated fat pad.
"You like it when I stuff you, you like the way people stare at you and you like knowing you're waking up even bigger than the day before."
Hizashi's palm pressed against the tip of Shouta's cock that could only poke out from it's fatty prison.
"You like being out of control."
"Mng-! I-I do…" Shouta was sweating profusely, like the fat pig he was.
"I bet by this point you couldn't even stop it you wanted to. I'm not wrong am I? You're too hooked on the feeling to quit."
"Oh my god, don't stop," Shouta begged as Hizashi thumbed his cock head.
"Tell me how much you like it."
"Like- Like what-?" Shouta could barely think.
"Your obesity."
Shouta's filter was now gone as well. "Love it. Love it so much, Hizashi you have no idea, oh fuck-!" Hizashi's fingers were now pressed into his fupa and stroking his neglected dick. "I'm getting bigger every day and it's incredible how good it feels. It's-It's so hard to stand these days with how f-fat my ass has grown."
"Yeah? What else is hard?"
"Doorways… Oh fuck- Doorways, my hips are s-starting to brush against the sides of them. One day, I'll get stuck, just like I got stuck yesterday."
"Stuck where?" Hizashi stroked faster.
Shouta's body was trembling. "Dining chair!"
"Did anyone see?"
"N-No… It was just me. My -oh god- my butt got stuck in the arm rests. Took me- shit- so many tr-tries to stand up!"
"What'll you do when one day you can't stand up on your own?" Hizashi was officially rock hard as well. "What happens when you've gotten too big for your own good?"
Shouta didn't even have to think about it. "Doesn't matter. 'Cause you'll be there to help me."
Hizashi's hand stuttered before jerking his friend off faster. "Yeah… yeah I will. I'll make you so fat, you'll need me to be there for you."
"How- How fat will you make me…?" Shouta needed to know.
"Dunno. As fat as you can get, probably."
"But what if- oh, don't stop, shit-! I'm so close!"
"What if, what?"
"Wh-What if I get too fat?" Shouta imagined himself, several times his current weight, so soft and massive that he was unable to move, feed or clean himself. The mental image pushed him over the edge, causing him to spill all over Hizashi's hand and the underside of his hanging gut with a hog-like grunt.
Hizashi worked his friend through his orgasm as he spoke. "Easy. If you get too fat, we'll just make you fatter. You'll never be too big, Shouta."
"No," Shouta moaned, eyes rolled into the back of his head, swollen legs trembling. "Never."