Mystic Messenger Fanfiction | ArixSaeyoung, ArixSaeran – Batter Battles | Commission
***I was commissioned again by @kittysymphony! This is a continuation of the last one I did for her - Twice as Worn - a poly relationship which is not sandwich. It’s two separate relationships which only inter-lap because they are dating the same girl, OC Ari. I do not write sandwich or twincest. This time she asked me for some adorable fluff birthday fun, and this was the result ~Let’s Connect! FFC***
***Other Works***
Saeyoung squinted at the recipe book. Not that he needed to - he had his glasses on, but he didn’t really understand what the difference between ‘tsp’ and 'tbs’ was. He wasn’t a terrible cook; he just…never cooked. Baking was something he did even more rarely.
A soft, “Tch,” got his attention as Saeran rolled his mint-colored eyes. “Well, if you’re so much better, then you give it a try. My sweet, sweet brother baking. It warms my heart!” Saeyoung put his clenched hands up by his face under his chin, his expression much like that of an excitable cat-character in an anime. Saeran had an obvious blush on his face, even though his expression was one of anger. “Stop acting like an idiot. I can make a much better cake than you.”
The younger twin reached out for the mixing bowl, but Saeyoung grabbed for the shiny silver object and pulled it away - holding it up above his own head like it was some sort of magic goblet. “Ah, ah, ah. You make your own batter. It’s a challenge now.” Saeran had to press a hand to his temple, trying not to explode with how ridiculous his brother was being.
“Would you stop that? You’re getting batter all over the floor!” There was already batter everywhere. Saeyoung wasn’t exactly handy with a mixer. “This is a big deal. Ari gave us a good birthday, and now we need to give her one, too.” It always felt like his brother never took anything seriously, and it was a great source of frustration for Saeran - especially when it came to something so important for their shared girlfriend.
There had been a bright gleam of mischief in Saeyoung’s eyes, but the redheaded twin was now losing that gleam as he slowly placed the bowl back on the counter. The action made a soft smooshing sound as the bowl squished down some of its lost batter. “I know.” His voice had turned serious. Saeran had to pause, completely taken aback by the shift in mood as his brother went on. “She takes really good care of us, really good care of you.”
Saeyoung had a lot of walls, they both did, and Saeran couldn’t help but find it unsettling every time those walls started to come down. He looked away, his pale bangs falling to cover his eyes as he tried to think of what he was supposed to say to that. His brother was opening up to him, and he was at a complete loss. Just a second ago, he’d been angry, but now he was getting frustrated for a different reason.
Ever since they’d made up, it was hard for them both to know how to be of any comfort to each other. Saeyoung had always been the one to take care of him, too - not the other way around. “Just stop being an idiot and get back to work on her cake.” The sentence had barely just been mumbled out, but Saeran already felt like it wasn’t any real form of encouragement.
Saeran turned his head to peek from under his bangs with mint-colored eyes, but apparently, he’d said the right thing. Saeyoung fished his wooden spoon from the mixing bowl, flicking it up into the air and causing more batter to splatter onto the kitchen floor. “Of course! The cake!” The pale-haired twin felt like he was starting to get irritated again. How could Saeyoung always get over everything so quickly?
A clean mixing bowl was shoved at him, and Saeran’s eyes widened in confusion and mixed annoyance. “What the-” As he looked up at Saeyoung, he realized that his brother wasn’t over it. He’d just decided to barrel ahead full speed despite his insecurities. Saeran would never admit how amazing he thought that was - he couldn’t do that kind of thing himself.
“You should make your own batter! Then we can see who makes the best cake.” Saeyoung had a broad smile on his face - even though, inside he didn’t feel nearly as confident. Saeran probably was the better baker. As they each started on their cake, the soft, “Tch,” his brother made felt like a bucket of cold water had been dumped on Saeyoung’s head.
He just wanted to give Ari the best birthday, but he wasn’t any good at this kind of stuff. Still, he couldn’t let himself stay down and out about it, because that would force Saeran to have to take care of him. His brother had been through too much for Saeran to be worrying about him. No, he should only be able to see the happy side, so that he wouldn’t have to struggle or be sad.
The next thing he knew, Saeran’s hand had closed over his own as he went to grab the sugar. “Saeran? What-?” Saeran just took the little container from him before handing Saeyoung another. “You were about to pour in salt. Tch…” The redhead looked down at his batter dejectedly. “Oh…Maybe I should just let you do it, huh?~” His voice was cheery despite the fact that he was feeling like a failure. Maybe there was something else he could do for Ari’s big day, but he wasn’t doing a good job now.
Saeran eyed his brother before he placed the salt back down on the counter -somehow finding an area without batter. “We should make her one big cake instead of two.” That felt so unnatural to him, working together with his brother, but Saeyoung was just going to keep moping otherwise. Saeran couldn’t help but think maybe it would be a nice experience, too - though he’d never admit it. The redheaded twin’s vibrant yellow eyes widened, a little sparkle appearing in them as his grin became genuine. “Working together with my bro? Sounds like a blast.”
***
Ari sighed heavily, placing her purse down next to the bunker door and flicking her dark hair behind her shoulder. Saeyoung had led her on a wild goose chase after some weird part around town. In the end, she’d had the thought to contact Vanderwood, and the agent just happened to have the part on-hand. Though, it was only through her stubborn attitude that she’d managed to get the brunet to hand it over.
A smile played across her face. Wouldn’t Saeyoung be proud she’d gotten back so soon with the item he’d requested? Her blue eyes were sparkling at the thought of the appreciative kiss he would give her, the way Saeran would scoff before she would go to give the smaller twin a kiss as well. Then she’d see him blush so sweetly as he tried to hide behind his bangs. Ari loved her life with the boys, but just as she was about to call out to them, she heard their raised voices in the kitchen.
That was the one part that was sometimes stressful about dating them both. Then again, even if she weren’t dating them both, they would argue. Ari shook her head, walking towards the kitchen to find out what the argument was about this time. Saeran was complaining as she approached. “Be more careful; you got some on me, Saeyoung!” Deep blue eyes widened as she took in the scene of the messy kitchen - Saeyoung intentionally flicking a wooden spoon full of some goopy material at his brother and earning an angry glob back. Except that, Saeyoung had ducked.
She didn’t have time to react, still in a shocked silence as she was trying to figure out what was happening. It was like the world was in slow motion for Saeyoung as he saw the look of shock on Saeran’s face. His brother had gone completely quiet, frozen. “Saeran? What is it?” Saeyoung followed Saeran’s gaze, further questions freezing in his throat as he saw just what it was. There was their girlfriend - using a single finger to slowly and carefully shove away the batter that had gotten on her eye and then flicking it off her finger to the ground.
“Oh God, Ari! I’m so sorry!” He was about to rush to her side when she shook out her head and started to laugh. It was comical. The looks on their faces were equal parts adorable and ridiculous. Ari just couldn’t help the giggles that escaped. “What are you doing?” Saeyoung immediately replied to her question, “Nothing,” while Saeran looked away - holding a hand over his face as he blushed. How were they supposed to explain they were trying to make her a cake for tomorrow’s festivities?
Ari only laughed louder now, approaching them and wrapping her arms around Saeran to give him a quick hug. He stiffened nervously before relaxing into her warmth. She leaned over to place a kiss to Saeyoung’s stunned and sweets-covered cheek. “Whatever you’re doing…I want in.” That was when she made her move, scooping up some of the goop and pressing it into Saeyoung’s neck before running away.
Suddenly, the kitchen was filled with commotion as the sticky concoction got tossed back and forth. Saeyoung was doing the best - on the offensive as he tossed glob after glob. Saeran appeared to be trying to avoid it for the most part - though every time he got the opportunity, he would attempt to get Saeyoung in the back of the head. Ari kept up with dodging the sugary mess, trying to get in a hit whenever she could on either of them. They were all starting to get exhausted, and the room was filled with laughter by the time Air felt her foot slipping out from under her as her shoe met with a particularly large glob.
A combined, “Watch out!” was the only thing she heard before she landed on a surprisingly soft surface - which turned out to be Saeyoung’s back. The redhead had dived for her, sliding across the slippery floor to land under her upper body as Saeran had grabbed her hand - keeping her from falling any further backwards to potentially harm her head. The white-haired twin was panting hard, terror in his eyes. Ari gave him a smile, moving her other hand to stroke the back of his lightly before she gave it a little tug. “Join us on the floor, Saeran.” Her voice was soft, though Saeyoung ended up teasing. “Yes, brother dear. The weather is delightful down here.”
Ari didn’t bother to suppress her giggle as Saeran gave a soft, “Tch,” per the usual. The smaller twin laid his own head in her lap as she moved to lay her head more on Saeyoung’s back, running her fingers through Saeran’s hair where there were little specks of batter. Batter…she now properly realized what it was. “Were you trying to make a cake?”
When neither of them responded, she just closed her eyes and smiled up at the ceiling. That was why Saeyoung had sent her out for that part, then. It had to be meant for her birthday. “Thank you…I really liked my cake. It was fun.” Saeyoung shifted a little underneath her head reaching for her other hand. The position was a little awkward, but she didn’t mind. “It probably tasted awful, anyway.” His little joke made Saeran stiffen up. “Speak for your part of it. I can probably still bake some of mine.”
Ari felt like her heart was swelling as the two started to bicker again. They’d gone through quite a bit of trouble to try to make her birthday special, then. That mattered a lot more than whether there was actually cake to eat or not.
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💞 fluffy times























