At the gym, Luka had convinced Miku to try chin ups on the bars; so she thought. With her hands firmly clasped around the metal bar, cold and unforgiving; feeling the burn ripping through her muscles with each lift. It wasn't long until she was struggling, though still blurting out words of encouragement to her friend who she could only see through her peripheral vision.

"The faster you do it the faster we get to the cafe!"
"Harden up diva!"
"Embrace the burn. . ."
"For the love of spring onions at the cafe, work harder!"
"Boy. . . I've forgotten how long it's been since I've done this. . ."
"Your fault. slacker!"
"What are you up to?"
"M-Miku"
"Miku. . . ?"

Luka paused, her arms stiff and burning like crazy as she hung loosely from the bar. Her eyes flickered sideways to Miku, who was hardly attached to the bar at all. In fact, all that was attached was her hair; two pigtails wrapped around the bars. Her feet were firmly planted on the floor, holding a small plastic container with strips of leek lined up within. She nibbled silently on each one, looking sideways to Luka.
"Hm?" she inquired, her expression blank.
"You've got to be kidding me. . . " Luka continued to hang from the bar, her hands feeling blistered.
"You're up to six. Keep going" Miku replied, refraining from making eye contact.
"While I am here sweating my backside off. . . " she dropped from the bar, clenching and unclenching her fists as she turned on Miku.
"You're here stuffing your face with food . ." Luka's tone was suddenly slightly cold, towering over her friend.
"Well. While you're here being a mature adult, I'm here being a teenage diva" Miku smiled sheepishly, trying to poke a joke; though it clearly wasn't working.
Luka's brow furrowed, her fringe casting a shadow over her face.
"E-e-mbrace the burn. . . ?" Miku seemed to shrink shorter then she already was, peering up at her friend.
Luka simply shook her head, breathing deeply and speaking with a dark tone, "Oh, I'll make you feel the burn in a minute"

A small squeak was the last thing heard from Miku as she took off across the gym, ducking under a short bar and jumping up a treadmill to balance on the front bar, reaching out to a tall piece of climbing equipment hanging from the ceiling. Luka paused for a moment, stalking over with heavy footsteps and a curled lip; she-beast activate.
Nearby visitors had frozen, watching the tense scene unfolding before them with curiosity.
Miku squealed again, shoving the container between her teeth and hastily scrambling up the climbing web.
With a small jump, Luka could reach the equipment without standing atop a treadmill. She took a hold and shook it left and right in a most violent manner, "Don't make me come up there!"
The runaway had taken one look at Luka and jumped, landing on a cushioned yoga mat, and taking off once more. Very quickly, it was apparent Luka's hard work had paid off.
While Miku was becoming exhausted fast from running about the gym though she may be fast, Luka's stamina was far better; easily keeping up. It wasn't long until Luka had almost very literally tackled Miku to the floor, and had her in a headlock. The pieces of leek were scattered all across the gym, the container rolling away across the floor.

"Feel the burn, eh?" Luka chuckled, giving a devilish grin.
"Ok-ay I-I'm sorry. . . l-let me go please. . . L-uka. . " Miku chocked, her face going white.
"If I let go, then you do me ten chin ups"
"What?! N-o way. . . !" Miku squirmed some more, but Luka kept her pinned.
"Sure?"
At that moment, a loud masculine voice boomed over the rest of the noise, bouncing off the walls.
"Out!" the manager hollowed.
Luka scrambled off of Miku, suddenly aware of her childish behaviour. She straightened up and looked down to her feet anxiously as a tall balding man approached.
"My apologies. . . Sir. " she commented quietly.
"We didn't mean any harm!" Miku blurted out.
The fellow only became even more red, a vein in his forehead popping out in pure frustration. His arm snapped up, a single accusing finger pointing to Luka, then Miku, and finishing at the door.
"Out." he rasped.

Without further question, the two of them left the gym and paused out on the street, still puffing from the recent chase.
"Well. That was quite a workout" Luka began briefly.
Her friend looked up with that same sheepish smile and whispered, "You're not mad at me for getting us kicked out?"
"Bah!" Luka shrugged and put an arm around Miku's shoulders, "It was the most fun I've had with you in a while" she smiled and went on a little more quietly, "Plus, it gives us a perfectly good excuse to get to the cafe early"
Miku chuckled along with Luka and the two trotted on down the road to the cafe, with a new spring in their step.

Later that afternoon, Luka stood in the door frame again, looking over at Kaito as Miku entered the room.
"Did you work hard?" he asked cheerily.
"You could say that. . "
Luka trailed off with a sheepish grin, much like Miku's only more impish.
Kaito seemed curious, but didn't push it, "Did you have fun, then?"
"Of course" Miku replied, followed by a giggle as she glanced back up at Luka, "Same time same place?"
"You got it" she responded in an upbeat tone.

The teenage Diva did not forget the week after ;D