It was Taehyung’s idea because of course it was.
Their group of friends was at a pizza place after enjoying a night out at the club.
Yoongi and Namjoon were in a deep conversation about song lyrics while Hoseok was minutes away from sleep, his head moving back and forth between both their shoulders as he cuddled with his boyfriends in the corner of their booth.
Taehyung and Jimin were sitting next to each other, sipping on water and watching their boyfriends across the table who were both somehow still eating.
The group had ordered pizzas for the table to share, but Jin and Jungkook probably had eaten a full pizza each by this point. Both already had big appetites and they became absolutely ravenous when drunk.
“Gguk is going to be so bloated in the morning. He drank beer at the club and now the pizza - I don’t understand how he doesn’t have a stomachache. I do from just watching him,” Jimin said as he leaned into Taehyung’s shoulder, growing pretty tired himself.
Taehyung hummed in agreement. “I know, right? I swear I would gain twenty pounds in a month if I ate the way Jinnie does.”
Jimin giggled as he thought about their boyfriends’ diets catching up with them. “You know what’s annoying though? I bet both of them would still look great if they gained twenty pounds. I’d look like a frumpy mess.”
“Oh hush, I bet it would all go to your ass and you would look hot as fuck,” Taehyung countered, poking his best friend’s side and making him laugh. He was a little caught up on Jimin’s comment though.
“Actually, I think they would look pretty great with another twenty pounds, Min.”
Jimin looked at him with a brow raised, seeming intrigued. “I mean, I think Ggukie would look incredible no matter what, but what are you suggesting? Those two eat like this almost every weekend and look at them - you would never know.”
Taehyung crossed his arms and thought it over. “How about a little wager?”
“Go on…” Jimin replied, interested in his best friend’s scheme.
“Twenty pounds starting tomorrow. Whoever can fatten their boyfriend up the quickest gets a fancy date night paid for by the loser,” Taehyung declared, watching his best friend’s eyes widen at the suggestion.
Jimin thought it over and held out his hand, thinking about how hot he found the idea of giving Jungkook a soft tummy. “You’re on.”
Jimin knew it was going to take planning to beat Taehyung since he was aware that the other couple had tried their hand at a fair share of food-related stuff in the bedroom. He had heard all about the best orgasm of Taehyung’s life which involved Jin eating whipped cream off his boyfriend.
Although, there were two things that worked in his favor - Jungkook was absolutely the most competitive person he knew and they both had intense praise kinks. Jimin knew he could use it in their favor.
His main approach was honesty, dropping the idea to Jungkook as they were getting ready for bed. The large amount of pizza had sobered his boyfriend enough to talk it over and surprisingly, Jungkook was completely on board.
Jungkook said he had always enjoyed Jimin calling the shots, he loved a challenge, especially against Jin, and, the most shocking admission, he actually knew about feedism from the sexual psychology class he took as a gen ed credit.
They decided that the whole thing would get called off as soon as one of them stopped enjoying themselves and any limits could be thrown in as they figured things out. Jungkook also made it very clear that he had every intention of beating Jin, fancy date or not, which made Jimin laugh.
Jimin also found that Jungkook was full of good ideas as his boyfriend suggested they ‘consummate’ their deal together - just for commitment's sake.
Waking up the next morning, Jimin did a little research on his phone while laying in bed. He looked over Jungkook’s shirtless body as his boyfriend was snuggled up against his side and noticed that he was bloated just as Jimin had guessed the night before.
However, Jimin was noticing for the first time that he thought his boyfriend looked really great with a bit of softness around his middle. Jungkook looked sturdy and strong like Jimin could spend hours warm and safe in his arms.
He placed a gentle kiss on Jungkook’s forehead and gave his stomach a tentative press, testing the waters for himself and thinking about how the twenty pounds would add to his boyfriend’s figure. Jimin would admit that his excitement was growing as he made his plans.
When he finally woke up, Jungkook found a bowl of hangover soup on the counter with ibuprofen and an americano next to a note from Jimin that said he would be back soon. He dug into his food right away, savoring his boyfriend’s cooking talents and looking forward to fully indulging his gluttonous side for the next few months.
As he finished off the last few bites, the front door of their shared apartment opened to reveal Jimin with various bags and a box in his hands. Jungkook helped him with some of the bags and watched as his boyfriend dropped the box on the counter with a dense thud.
Jungkook looked in the box and saw that it was a bunch of small cartons filling the box. “What’s all this?”
“This…” Jimin said as he pulled a carton out of the box, “...is how we win.”
Taking the carton from his boyfriend, Jungkook read the label and his eyes widened. “That’s a lot of heavy cream, babe.”
Jimin nodded with a smile. “Yep, and you are going to drink one every night before bed.”
“Oh…” Jungkook whispered, surprised to find that he was turned on by the idea instead of nervous or uncertain. “How did you come up with this idea?”
“I did some research this morning. I wanted to make sure we did this as healthy as possible so you didn’t get sick. And so, you know, we won,” Jimin explained with a smile, putting the carton back in the box.
Jungkook wrapped his arms around Jimin’s waist and kissed him softly. “I know this may sound weird, but I am really looking forward to this.”
Taehyung had texted Jimin about the terms of their agreement and sent picture proof of their boyfriend’s starting weights. While Jimin was not going to disclose their plan, his best friend openly told him they intended to stuff Jin with a huge dinner every night and were quite confident in their win already.
Jimin was coy with his answers and said they would try their best, even going as far as saying that he was saving money for the fancy date budget in the event of their loss. He had Taehyung eating out of the palm of his hand figuratively while Jungkook was literally doing so.
Alongside their nightly serving of heavy cream, Jimin’s plan was to keep his boyfriend eating more all day rather than a single meal. He made sure to cook homemade, hearty meals paired with a fully stocked pantry of snacks.
Jungkook was honestly impressed with his boyfriend’s concise research, but he had to admit, Jimin was considered an overachiever for a reason. He was shocked to find that he had already gained seven pounds just a little over two weeks into the wager even though his stomach showed a clear indication of where that weight went.
By the one-month mark, Jungkook had gained another six making him thirteen pounds heavier and twice as confident as he was at the start of their agreement. Jimin had always been attentive and took care of him well, but something about this new dynamic had Jungkook falling more in love with his boyfriend.
Not to mention what it had done for their already-active sex life.
As he got ready for a night out with their friends, Jungkook noticed a difference in his body for the first time. He had taken to wearing sweatpants and hoodies since Jimin had been keeping him well-fed and his stomach had needed room to accommodate the amount of food he was eating each day.
Pulling on his typical black jeans he wore to the club, Jungkook noticed they were a little harder to button. The pants were already snug before, his ‘ass-hugging’ jeans as Jimin lovingly called them. But now, they were definitively tight - the new pudgy layer around his middle pushing over the waistband into a little muffin top.
Jimin stepped up behind him and squeezed his sides, kissing his bare shoulder. “My baby is getting soft.”
Jungkook felt his cheeks warm up with his boyfriend’s direct acknowledgment of his growing size. Jimin had always been able to fluster him, but it was at a new level with their current arrangement.
“Feels nice,” Jungkook replied quietly, enjoying the feeling of his boyfriend’s hands on his body.
Jimin smirked and kissed Jungkook’s neck to his ear. “It does feel nice and it looks even better. So handsome.”
Jungkook tried to fight off the deeper blush that he knew was spreading to his chest. He pulled Jimin around him to wrap him in a proper hug. “What if we just stay home tonight?”
“Oh, you don’t want to go show all this off?” Jimin teased, one brow raised as he ran his eyes over Jungkook’s midsection.
“Maybe I just want to show it off for you,” Jungkook replied, laying his hands over Jimin’s and intertwining their fingers. He stepped away and directed them toward their bed, falling back and pulling his boyfriend with him.
Jimin went willingly, bracing his hands on either side of Jungkook’s shoulders to catch his fall. He lay against his boyfriend, taking a moment to feel the difference between their bare midsections - Jimin’s toned abdomen further emphasizing Jungkook’s new softness.
They made out hungrily for a few minutes, the only sound filling the room being their lips connecting and heavy breathing. In a swift show of his strength and a burst of unexpected dominance, Jungkook flipped them over and attached his lips to Jimin’s neck.
As his boyfriend’s lips trailed down his chest, Jimin grabbed a handful of Jungkook’s hair and finally responded, “You’re right, baby. We should stay home.”
“So, what happened on Saturday? Just couldn’t face me, already mourning your loss,” Taehyung said smugly, poking Jimin in the side as they walked toward the library.
The couple had actually stayed in, but it was by no means an early night. They were up until dawn appreciating their time together and spent most of Sunday lazing around and keeping Jungkook fed.
Jimin rolled his eyes and took a long sip of his coffee. “If you must know, Ggukie and I enjoyed some personal time instead of going out.”
Taehyung laughed, breaking his stoic demeanor. “You stayed home to fuck? God, only you.”
“It was Jungkook’s idea…this time,” Jimin replied with a smirk, making both of them laugh even harder.
Taehyung held the door open for Jimin as the still-laughing duo walked into the library. They quickly found the room where their boyfriends were studying and joined them.
Jimin noticed the slight cling of Jin’s t-shirt on his stomach and saw a little more softness on his cheeks, clear signs of him gaining a bit. However, he knew that they were in the lead even if it wasn’t evident by looking at his boyfriend.
Placing himself in Jungkook’s lap, Jimin could feel the little belly in progress below his boyfriend’s oversized sweatshirt. His weight gain had gone completely to his midsection and was well hidden beneath his clothing choices making it seem as if he had barely gained at all.
There was a certain extra level of satisfaction that Jimin was feeling against Taehyung’s cocky attitude toward the bet when he knew that the impressive speed of Jungkook’s gain would be an unexpected reveal.
Jimin wrapped his arm around Jungkook’s shoulders and leaned in for a kiss. “Hey, baby.”
“Hi, did you have a good day?” Jungkook asked quietly, bringing his arms around Jimin’s waist to keep him in his lap.
Nodding while moving back in for another kiss, unable to resist his boyfriend’s sweet smile, Jimin hummed a positive response. “The usual. Would have rather spent it like this weekend, honestly.”
Jungkook looked up at him with a soft smile, tightening his grip in recognition of his boyfriend’s sentiment. He pulled him closer until he could rest his head on Jimin’s chest, pressing his lips to his collarbone.
“Ugh, you two are sickening,” Taehyung quipped, staring at them with an amused expression while Jin faked a gag.
Jimin stuck his tongue out at Taehyung making all four of them laugh before they actually started studying. Time passed quickly and Jimin looked at his phone after finishing an assignment to find it had already been two hours since he and Taehyung arrived.
Reaching over into Jungkook’s bag, Jimin pulled out one of the various snacks that were in the front pocket. He slid a container to his boyfriend after opening it and encouraged, “Have a snack, baby. We’ve been working for a while.”
Jungkook smiled and instantly reached for one of the protein bites in the container, leaning over to give Jimin a quick kiss. “Thanks, Minnie.”
Taehyung looked at his best friend and rolled his eyes. He knew that Jimin had been making all of Jungkook’s food and assumed that it was never as much as what he was giving Jin. With his lack of cooking skills and hefty bank account from his and Jin’s parents, they relied on takeout and convenience store trips for their calories.
What Taehyung didn’t consider was that Jimin had full control over went into every bite Jungkook had and he ensured that it was never lacking in nutritional value and calorie density. Jimin did solid research and meal prep with the intention of winning the bet as well as helping his boyfriend fill out so nicely.
As he watched Jungkook work through the little cute container of whatever Jimin had made for him, Taehyung pulled out his wallet and handed his campus card to Jin. “You’ve been working for a while too, babe. Why don’t we visit the vending machine?”
It was now Jimin’s turn to roll his eyes, knowing exactly why Taehyung brought it up. He watched as both of them got up, Jin even asking with a smirk if Jungkook wanted anything.
Jungkook shook his head and placed his hand on Jimin’s leg. “Nope, Min takes care of me just fine.”
Jimin smiled and leaned over to kiss his boyfriend’s cheek, watching as their friends yet again reacted dramatically. Once they were out of earshot, Jimin turned to Jungkook and said, “Tae is so cocky. He asked me if we were mourning our loss this weekend and couldn’t face him.”
Jungkook threw his head back and laughed, “He’s ridiculous. It doesn’t help that Jin is the same way. When we got here, he asked if I lost weight and thought it was hilarious.”
“Jinnie’s probably gained half of what you have; we’ve got this in the bag,” Jimin replied, leaning back in his chair with his arms crossed and feeling a bit smug. He knew that Taehyung’s attitude was making him more competitive.
“What if we give them a little sneak peek when they get back?”
Jimin raised his brow in confusion. “What do you mean?”
Jungkook lifted the hem of his hoodie to reveal his white t-shirt below, one that was already rather form-fitting prior to their little arrangement. It was fairly tight, hugging Jungkook’s middle in a way that made his stomach look like it had grown even more than it already had. His belly sat over the waistband of his sweatpants and was a bit rounded out since he had topped off his day-long grazing with the snacks Jimin just gave him.
“When they get back, say that you are cold and ask for my hoodie. I’ll take it off and we’ll see if they change their tune about the whole thing,” Jungkook explained with a smirk.
Jimin grabbed his chin and pulled him in for a deeper kiss than their earlier chaste pecks. “God, I love you. You are so sexy - have I told you that lately?”
“Yeah, a couple of times,” Jungkook answered with a smile, returning for another kiss.
Sometimes, he was a little shocked by how much this new dynamic affected him, expecting insecurities or frustrations to pop up during the transition. Between how amazing it felt to indulge and Jimin’s constant, genuine praise, he was loving the recent changes.
They tried to keep it PG since they were in the library and waited for their friends to return, Jungkook finishing the container of protein bites in the meantime.
The pair walked back through the door and Jin was holding a bag of chips and a couple of candy bars. Jimin knew it obviously had calories to it, but he was well aware that Jungkook’s snacks throughout the day were double, if not triple, what Jin’s were.
Once everyone was back to work, Jimin finally reached over and tapped his boyfriend’s hand. “It’s a little chilly in here, baby. Do you mind if I steal your sweatshirt?”
Taehyung and Jin both looked up at them, mainly ready to tease Jimin for always being cold, but their words fell short, growing speechless as Jungkook stood and pulled his hoodie over his head. Jimin almost laughed at their reaction, as they stared at his boyfriend who turned sideways to give them a clear view of their impending loss.
They ignored their friends who were attempting to hide their reactions. Jimin accepted the hoodie and pulled it over his head, genuinely relishing in the warmth it spread over his body along with the smell of Jungkook’s cologne. He kissed the other’s cheek in thanks and went back to his homework, trying his best not to stare over at Jungkook’s soft belly.
Jin whispered something in Taehyung’s ear and the couple started to pack up their things. Jimin looked up in confusion and Jungkook asked, “You guys are leaving?”
Taehyung nodded and cleared his throat a few times. “Uh...yeah, we need to…um, we finished what we were working on. We’re gonna head home and get dinner.”
“Oh, okay, well, have a good night,” Jimin replied lightly, keeping his tone completely normal even though he was laughing on the inside.
They watched as their packed their bags in record time and left the room. The door was closed for a few seconds before they both burst into laughter. Jimin leaned into Jungkook’s shoulder, nearly in tears.
“Oh my God, Tae’s face was hilarious. He’s going to make Jin eat until he’s sick tonight,” Jungkook said, only making Jimin laugh harder.
Eventually, they calmed down and decided to head home too. There was no reason they couldn’t enjoy a nice dinner together as well.
Six weeks after the bet started, Jimin knew they had won. Jungkook was reclined on the couch, one hand on his stuffed belly as they watched a movie. It had actually been Jimin’s idea.
With three pounds to go, Jimin decided that they would spend the weekend closing their gap and securing their win. He told Jungkook they could have a Marvel marathon and he was going to feed him the entire time.
They got up Saturday morning and Jimin cooked him a huge breakfast while Jungkook got the living set up. He fed him bite after bite of a hefty, American-style breakfast while they watched the first Iron Man film.
After clearing multiple plates, Jimin let him have a little break and some belly rubs until the movie finished, but they were far from done. As soon as the next film started, Jungkook was eating again.
Jimin brought him snacks and drinks in every free moment, encouraging him to keep grazing while he went to prepare lunch. He knew they had been stretching Jungkook’s stomach capacity with his new habits, but Jimin was really going to push it that weekend - eyes set on the prize.
Lunch had been a bit of a reprieve compared to the rest of the day. Jimin never wanted Jungkook to feel ill so he kept it simple with kimchi-jjigae, something they could eat a little mindlessly. He brought him a decent size bowl with a large serving of rice and told him to just eat as much as he wanted.
He should’ve known better that Jungkook wasn’t going to hold back, finishing the soup and rice with ease. Letting a slight belch when he was finished, Jungkook reclined back into the couch and focused back on the movie.
Jimin couldn’t help but appreciate the growing state of Jungkook’s middle. Although his boyfriend had spent most of his days grazing throughout, Jungkook wasn’t typically eating big meals and snacks back-to-back all day. This was a welcome sight in his opinion.
It was only mid-afternoon and Jungkook’s belly was already rounding out, his shirt highlighting the amount of food he had already eaten. Jimin gave him a gentle massage, helping him digest his meal.
Unsurprisingly, Jungkook fell asleep after lunch - falling into a bit of a food coma. Jimin smiled and kissed his forehead, leaving a note that he was going to run to the store to restock a few things.
By the time Jimin got home and got the groceries put away, Jungkook was awake and watching the first Avengers film. Jimin greeted him with a kiss and handed him two banana milks and a bag of honey butter chips.
Jungkook decided to pause the movie and go sit at the kitchen counter while Jimin prepared dinner, not all that surprised to see his boyfriend going all out on dinner. With various containers of banchan and a couple of trays of meat, it was clear that Jimin was going to set up a full KBBQ at home for the evening.
Dinner seemed to go on for the rest of the night. As long as Jimin kept cooking the meat, Jungkook kept eating. He was impressed by his boyfriend’s unending appetite, but Jimin also knew that Jungkook enjoyed it, having told him that he was really enjoying the sensation of being full lately.
With the ending scene of Iron Man 3 playing, Jungkook finally tapped out. Jimin honored it, more than impressed with how much his boyfriend had eaten. He cleaned up everything quickly while Jungkook laid back on the couch, feeling more full than he ever had been before.
Jimin helped him off the couch, holding back a laugh as Jungkook walked like a pregnant woman and crawled into bed where they put on the next movie. He massaged Jungkook’s stuffed middle and whispered sweet praises in his ear.
As Jungkook was starting to doze through the end of the film, Jimin kissed his forehead and told him that he would be back in a minute. Jungkook assumed that he was going to actually get ready for bed, but he was met with a surprise when Jimin returned with a little carton of cold heavy cream.
“It’s the last one, baby. You have to finish it, right?” Jimin asked sweetly, allowing Jungkook space to turn him down.
But, Jungkook just smiled and nodded. “I mean, it can’t go to waste.”
Jimin hopped up on the bed and offered it to his boyfriend, surprised to see him start chugging it down instead of sipping on it as he expected. It was nearly gone before Jimin had even settled.
Jungkook drained the last bit and leaned back into his pillows, hand on top of his stomach with a quiet groan. “I’ve never been this full in my life.”
With an exasperated laugh, Jimin’s hands found their way back to his belly which was impressively tight. He leaned in and started placing kisses along Jungkook’s jaw and neck.
“Mmm, might be too full for anything tonight, Min. I feel like I could pop,” Jungkook mumbled, his head thrown back against the headboard and his eyes closed.
His words sent a shiver down Jimin’s spine as he straddled his boyfriend. “Don’t worry, baby, I’ll take care of everything,” he said softly before disappearing under the covers and keeping his word until they fell asleep.
The next morning, they woke up similarly to the first morning of their bet. Jimin was propped up on the pillows looking through his phone while Jungkook was curled into his side. He thought back to his boyfriend’s little bloated tummy that seemed so big at the time and compared it to what he was seeing now.
Jungkook still looked as if he had just finished a big meal, the weight settling overnight from the top of his stomach to his lower belly. He looked so soft and warm that Jimin just had to cuddle him.
“Minnie?” Jungkook asked groggily, turning slightly to wrap his arms around his boyfriend.
Jimin smiled and kissed his cheek softly, “Morning, baby.”
Jungkook tucked his face into Jimin’s neck and felt one of his boyfriend’s hand slide down his chest to his stomach, pushing slightly on his bloated belly. “Oh…wow…”
“Want to go see if we’ve won?” Jimin whispered, smirking at his boyfriend’s reaction to his growing midsection.
Jungkook simply nodded and let Jimin pull him out of bed, leading them both to the bathroom where they got out the scale and waited for it to kick on. With a gentle nudge, Jimin encouraged him to step on and they both waited in anticipation.
The scale beeped once and the red numbers flashed up at them. Jimin did some quick math and wrapped his arms around Jungkook, kissing his shoulder while he snapped a picture of the scale. “21 and a half pounds in six weeks, baby. I’m so proud.”
Jungkook’s cheeks flushed with a bright blush, but he also felt a bit of that pride himself. “We won.”
“Yes, we did. Let’s celebrate,” Jimin replied, pulling Jungkook’s hand to lead him back to bed. He quickly sent a text to their group chat with the photo followed by a few teasing GIFs and laughing emojis before silencing his phone.
Pulling Jimin down on top of him, Jungkook felt the growing difference between their abdomens, and a thought crossed his mind. “So…”
“So?” Jimin asked, waiting to see what the hold-up was.
That pink flush returned to Jungkook’s cheeks as he thought about how to phrase his next question. “What if…I mean, this doesn’t have to, you know, fully stop, right?”
Jimin tilted his head and rested his weight fully on Jungkook, feeling the softness of his belly against his toned muscles. “Stop what, Gguk?”
“Maybe we slow down a bit and I can start going to the gym again now that we won, but I like when you feed me,” Jungkook finally admitted, embarrassed by his own words.
Jimin’s eyes lit up in a smile and he pressed a deep kiss to Jungkook’s lips. “Don’t you worry, baby. I have no intentions of stopping any time soon.”