The cost of living indulgent
Rosaria/Kaeya
Halloween prompt: outgrown costume
The morning sun. What normally would’ve been a pleasant warmth on his body, was now an irritating reminder of his duty to come out of his comfortable bed and face the day ahead. He spends ample time fixing up his hair, doing his make-up, and wiggling his hefty body into his barely fitting uniform. This is counterbalanced though by the little amount of time he needs to decide to ditch his belt entirely. He’d been hanging onto that belt for a while now, saying it completed his outfit perfectly, but after days of wrestling to get it closed on even the loosest loop, today was the day he’d finally let it go.
The red lines that had been consistent around his muffin top thanked him for his decision. As eating light for breakfast had pretty much left his routine, he was even happier with his decision to ditch his belt. After a mountain of greasy scrambled eggs, Kaeya had to walk to work with one hand supporting the heft of his belly.
Work doesn’t seem to treat him much better, however. Even doing basic drills is now enough to make him regret his choices. The cavalry has no trouble keeping up with his instructions and demonstrations but the whole time, he’s berating himself for his large breakfast with only one wish on his mind. To lay down.
After this whole ordeal, he’s in the mood to make someone else’s morning difficult. And who would be better than his favorite sister in Mondstadt? Maybe he’ll go to the church to find his Rosaria for a little chat. He knows that the knights have been planning some party for Halloween and he’d be more than happy to go there with the most reluctant partygoer in Town, besides Diluc of course.
He decides to start her off with a simple conversation starter and asks her what she’ll dress up as this year for Halloween. She brushes him off, saying she’ll probably be the same thing as last year. She’s trying and failing to seem uninterested as her gaze is drawn towards the way that Kaeya’s cleavage is becoming more and more obscene each day and the blouse he’s currently wearing is doing him no favors in that regard.
Keaya tries to tease her by saying that’s no fun, but she retaliates by saying she can at least fit into last year's costume. She pushes them more out of direct sight of the churchgoers and makes a point of giving his muffin top a small squeeze where nobody can see it.
He places a hand on top of hers and leans forward to whisper in her ear.
“You say that as though you think it’s a bad thing.”
With her hand still nestled into the overhang of his belly, Rosaria almost completely forgets where they are and is crudely reminded when a different sister breaks the moment by asking her for help. She didn’t even really hear what the other sister asked of her, but she quickly let's go of Kaeya, who could not look more pleased with himself at that moment.
“I’m sorry, did I interrupt anything?”
Before she can even respond, Kaeya decides to join in the conversation. “Not at all, we were just discussing costumes for the coming Halloween party.”
He makes a show of telling both sisters about the brand new costume he’d ordered way ahead of time and it should be coming in the day before the party. Rosaria, sensing that this will not end well, asks to be there when he receives it. to ‘see what all this fuss is about’ she says, but the small tint of red creeping up her cheeks betrays her.
With an equally flushed expression, Keaya agrees and they part ways. Kaeya quickly makes his way out of the church, but he keeps a hand on the soft spot of his belly where a small bruise a forming from her iron grip. Well, this was bound to be interesting.
-------------
Come the morning of arrival, Keaya has made breakfast for both himself and Rosaria, who came early to see the show. He’s made a big breakfast for both of them, knowing full well that she would quit halfway through and push her still sizable plate over to him.
She’s feeding him bits of pancake when a knock sounds at the door. She rushes to open it and Keaya giggles and her uncharacteristic excitement.
That joy from seeing her excitement is quickly overshadowed when he is forced to stand up with a groan, belly still packed full from breakfast. He takes to package from her hands and is pleased with the soft and stretchy fabric he has chosen.
Finding the stairs too much effort in his current state, he moves to his living room to change into his new costume. He strips slowly, both to give a good show of his growing curves and to not aggravate his stuffed belly with fast movement. Seemingly completely unaware of Rosaria standing in the doorway, though more likely just not minding that she is watching him undress.
He really tried to make a good show of trying on his new costume, alas it seemed he was destined to struggle when the fabric of the pants was squeezing the skin on his jiggly thighs. Rosaria wore a smirk like she knew it was going to happen.
“Why won’t it go up? It’s tailor-made to my exact measurements?"
“Measurements from when exactly?” she asked smugly as realization began to dawn on him. He’d ordered this costume 2 months ago and already struggling to get into it.
Determined to wipe the smirk off her face, he persevered. The small hops he made to wiggle his way onto these pants were jiggling his still full belly and if getting it over his ass was difficult, buttoning it seemed impossible. Sighing in defeat, he let himself fall back onto the couch, wincing when the movement once again jostled his full belly. And quite the picture he was. Not even bothering to try on the button-up shirt that came with his costume and pants fully unbuttoned, he laid back with his plumb belly and soft tits easily accessible.
Rosaria walked over to get her hands on the mountain of fat now on full display and completely at her mercy.
“This was to be expected, but you know what I think will cheer you up?”
“What?”
“How about I go grab the last of your pancakes, you still haven’t finished your breakfast you know?”
If it struggled to fit before, Keaya had no hopes of getting into this costume with his ever-growing body, well taken care of and filled to the brim with delicious treats. Oh well, seeing the state he is currently in, accompanied by Rosaria who seemed more than happy to stay for lunch and dinner as well, he thought he’d rather stay in anyway.
