AgeRe + PetRe Reader x BNHA Oneshots

Uh Oh! (CG! Momo)

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Pronouns: they/them
Big Age: 16
Little Age: 2
Quirk: Breathing fire
Place: Training Ground
Caretaker(s): Momo
Yayorozu
Situation: Momo and Y/N
are paired up for a hero
and villain training
mission, but when Bakugo
says something to trigger
Y/N's littlespace, it's up
to Momo to save the day.
                                                    ┘

TW: Swearing, anti-little behaviour, violence.

With their backs pressed up against a building, Momo and Y/N grimaced at the explosions outside their safe alleyway. Tsuyu bounded along the far sidewalk, looking dutifully around for any other students as the two heroes pressed further into the shadows.

"All we have to do," Momo started, "is grab those little red cloths, right?"

Y/N nodded, locked onto the small piece of red fabric waving behind Tsuyu. "Yup, that's all."

Narrowing their eyes as the explosions grew closer, Y/N reached for a flask latched onto their pant leg and brought it up to their lips. The flammable liquid poured onto their tongue, ruining their tastebuds.

Bakugo flew past overhead, red cloth attached firmly to his boot. Y/N reopened their eyes and watched as Momo made her way delicately to the light of the street, producing a small dog-catching device from the open part of her costume.

"You go after Bakugo," she whispered. "Your firepower nearly matches his. I'll go after Tsu."

Y/N nodded, unable to speak with the liquid in their mouth, and sped up the alley in the opposite direction. It was very common for Bakugo to sit atop things and look down, rather than staying low and stealthy. Fortunately for him, he was a villain in this exercise and the strategy worked well. At least that kept him predictable.

Ripping around a corner, Y/N spotted a fire ladder and jumped onto it, scurrying to the top. A loud bang sounded from behind them and they spun around, coming face-to-face with the villain himself.

Without much of a thought, Y/N spat the liquid out onto his boots and sprayed out some flames to ignite it. They planned on disintegrating the cloth and counting it as taken, as Bakugo isn't quite stupid enough to let them take a swipe at it.

"What the-" Bakugo spat, stomping some of the flame out. He flicked his gaze back up to Y/N, who had already started to flee off the other side of the building. "Get back here, you little shit!"

Bakugo's explosions became closer and closer as Y/N approached the edge of the building. Panic struck through their spine as they realised there was no way down, so they skidded carefully to a stop, grimacing at the loud explosions behind them. With barely a flick of his wrist, Bakugo stopped at the edge, picked Y/N up by the back of their costume and held them over the edge of the building.

"I swear to god, you little brat, if you melt my boots, you're gonna have to pay it back," Bakugo threatened loudly. "Do you understand?"

"U-uh, yes..." Y/N stuttered, then added a quiet, "sir..."

"What was that, brat?!" Bakugo yelled, pushing Y/N further out from the building.

As they slipped little by little, Y/N curled further and further into a ball, repeating the phrase, "Yes, sir." over and over in smaller voices each time.

Bakugo stepped back, then bunched his muscles and charged forward. "The fuck is wrong with you?" he yelled, pelting across the rooftop, his anger visibly overflowing. "I'm not a 'sir' and I'm certainly not here to listen to you whinge!"

Y/N stays in place, but their eyes widen and they let out a high-pitched scream as Bakugo barrels toward them. A loud "OOF!" sounds in Bakugo's direction, followed by a metallic clang a bit further away. Opening their eyes, Y/N looks up at Momo, huffing as she straightens up. Bakugo is trapped under a large metal frame on the other side of the building and Momo holds both his and Tsu's red cloths.

Momo looks to them softly. "You good, Y/N?" she asks, out of breath. She kneels down to them and takes their hands. "I heard you scream. Did the big man hurt you?"

"Nuh-uh," Y/N replied, pulling her in for a hug. "Brat! He called brat!"

At the little's distress, Momo stood up and stomped over to Bakugo, the fire of a thousand suns burning in her eyes. She stood over him menacingly and looked into his eyes, bending down just so that he could hear her whisper. "If you ever touch them, Bakugo, I promise you will never see the light of day again."

Y/N strained to hear her, but she was much too far away.

(sorry y'all!! i kind of rushed to get this out but its kinda late </3)