Syncing Dream [Aespa x M!Reader]

11. Gym-selle life

It was a rare, calm afternoon at SM's gym, and Y/n found himself with some unexpected free time. No schedules, no urgent texts from the group, and no chaotic last-minute changes—just peace. But peace didn't seem to last long, not with Giselle around.

"Hey, boss baby," Giselle's voice rang out as she walked into the gym, a sly grin plastered on her face. She was dressed in her workout gear, hair tied up in a messy bun. "I heard you were looking for someone to train with."

Y/n, who had been lazily scrolling through his phone while sitting on a bench, raised an eyebrow. "...Was I?"

"Well, you are now," she declared, grabbing a mat and plopping it down next to him. "Come on, let's do a workout together. I've got some steam to blow off, and you could use the exercise."

Y/n snorted. "I do exercise, Aeri"

"You walk us from the van to the stage. That doesn't count."

"Hey, there's a lot more to my job than that," Y/n shot back, standing up to stretch. "Besides, I'm not *that* out of shape."

Giselle crossed her arms and eyed him suspiciously. "Really? Because I'm pretty sure the last time you ran, you were dead after a flight of stairs."

Y/n's mouth opened, ready to argue, but he couldn't exactly deny the truth. "Okay, fine. But that doesn't mean I can't keep up."

"Prove it then," she said with a challenging glint in her eyes. "Let's do some cardio, weights, and maybe a bit of core. Think you can handle it?"

"Oh, don't test me, Uchinaga" Y/n said, rolling up his sleeves and drove both of them to the gym.

-

The first few sets went as expected.

Y/n kept up with Giselle through the warm-up—jumping jacks, a bit of light jogging, and stretches. He felt confident. Too confident.

But as soon as Giselle cranked up the intensity with high-knees and burpees, Y/n quickly realised he might have bitten off more than he could chew.

"Fcking hell, you... do this... often?" Y/n panted, trying to catch his breath between sets. His legs were already feeling the burn, and they hadn't even started with the weights yet.

Giselle, barely breaking a sweat, looked over at him with a smirk. "I'm fine, Y/n. You good?"

"Never better," Y/n grunted, wiping the sweat from his brow and forcing himself to keep up. He wasn't about to let Giselle think he couldn't handle it.

The next part of the workout involved weights, and Y/n felt slightly more confident. He had done some weight training before—how hard could it be?

The answer: very.

Giselle lifted with ease, moving through reps with the kind of strength that made Y/n wonder if she had secretly been training for a boxing match. Meanwhile, he was struggling to maintain his form without collapsing under the weight.

"Come on, Y/n, you got this!" Giselle teased, watching him wobble as he tried to do a squat with a barbell. "You're not gonna let me out-lift you, are you?"

Y/n gritted his teeth, determined to push through the pain. "Hell no."

But by the time they got to the core workout—planks, sit-ups, and leg raises—Y/n was just about ready to tap out. He collapsed onto the mat, staring up at the ceiling as his abs screamed in protest.

Giselle, still full of energy, laughed and nudged him with her foot. "Tired already?"

"Damn...right I....am..," Y/n wheezed, still flat on the ground. "Just... Gonna catch my breath."