A/N: Here's a little story I've been rolling around my head for a while. I know the plot is not very original but nevertheless I'm not planning in stretching it out for that many chapters. And this is more of a fun and teenage-ish idea more than anything else. So, I hope you'll enjoy!

Prologue.

Another day.

Another experiment.

Another note latched onto a beaker with the word 'failure' in bold format along with a small explanation behind said failure of said experiment. To say that it was starting to get depressing was an understatement but he was so close and no matter what, he would not give up hope just yet.

Donatello pinched the skin between his eyes with a sigh that signalled his tiredness, writing fast words on documents that he put aside as he rose up from chair. His body felt painfully stiff from sitting in the exact position for the past few hours which could be confirmed by the small kinks that sounded as he stretched his neck and worked his shoulders. Rubbing his checks, chestnut brown eyes landed on the alarm clock on his work table whose red numbers showed him that he had yet again been up till the ungodly hours of night while his family was asleep.

The reason for this was simple; he was pushing his body's limits till its fullest because he was really close to finding the formula for the retro-mutagen that would cure all those unintended mutations that had occurred throughout the last few months. Especially, he wanted to be able to cure Timothy and Mr. O'Neil whose mutations have had the greatest impact on them. He would be lying if he said that April wasn't a great motivator for his experiments as of late.

Sure, there would be an inner reward in curing those other mutants, but seeing his favourite redhead wear that beautiful smile and gleam in her azure eyes would definitely be enough of a reward for this turtle. But up until now, his experiments had shown to have no results which had practically drained the determination from the intelligent turtle at first.

But then as he'd kept trying – and after a whole lotta mugs of caffeine – Donnie began progressing and each failed test proved to show just how much closer he was getting. He knew that at this rate he might actually get something useful if he kept up this way. That's why he didn't leave his lab and why he wasn't seen at all around his brothers, but they understood not to disturb him when he was in this state of mind and came in with a tray of fresh food and his coffee so that he wouldn't collapse from starvation.

A yawn was drawn from the purple-banded turtle and as he put another batch of modified mutagen inside the centrifuge, he could feel that his eye-lids were growing very much heavy. Staring at the spinning motions that the centrifuge was making did not help him stay awake in the slightest and he had to keep a steady grip onto the edges of the table because his shoulders were giving up on him. Simply standing on his feet became a difficult task, so he sat down again as he waited. Putting his documents away, laying his head on his arms and just letting the calming, steady hum of the machinery lull him to sleep…

Donatello woke up abruptly by the sudden sounds of a functioning television, objects falling to the floor and his brothers' laughter and shouts. That wasn't usually a good sign.

The olive turtle rubbed his head that throbbed just slightly to signal an incoming headache. He really shouldn't sleep on the desks; it did little good to his body. Rubbing the sleep out of his eyes, he noticed two things; according to the clock he'd only slept half the hours of what he should have and that his batch of retro-mutagen was done. Donnie reached out to grab the beaker carefully between his fingers due to them shaking slightly in anticipation.

He had much faith in that this particular experiment would turn out to show positive results, he could feel it in his gut. Now as a precaution, he just had to write down the exact measurements of the ingredients used and the different temperatures taking whilst heating up the mutagen in case this turns out to be a success.

Using his other unoccupied hand to take hold of a measuring cup containing the rest of the retro-mutagen he had modified, Donatello moved to put it aside and perhaps finally end his work so that he could socialize with the rest of his family.

But before that ever happened, a large crash could be heard that caused his door to burst open, also causing the young scientist to nearly jump and spill batch of his retro-mutagen.

He scowled angrily at the source of noise which turned out to be his two eldest brothers Leo and Raph, bickering over who had rightfully won the last round during their game of 'Ninja Dodge ball'. Which meant they were playing around with the Kraang Orb again.

"Do you mind knocking the door before you enter so thoughtlessly next time? I'd like to be at least mentally prepared for your disturbing," Donnie said dryly as he cautiously tried not to spill anything. His brothers, however, ignored his comment in favour of focusing on their task at hand which was to find their missing youngest brother who apparently had their 'ball'.

"Mikey's trying to hit us both while we're distracted and score the last point," Leo shushed as they both looked around in search of him.

"Too bad my fist will collide with the back of his head before that ever happens," Raph snorted as a reply.

"May I ask why you're looking for him in here? It should be kind of obvious that I'm quite busy."

"Don't worry, we'll leave in a second. You sure you didn't see him sneaking around in here?"

"Yes." Which was maybe a lie because Donatello had been so engulfed in his work that he wouldn't know if anyone had entered his lab in stealth-mode. But everything to make these people leave him be and do his job; he longed to finally use his limbs properly. His brain's have had enough exercise for now.

And then Mikey had appeared.

How in the world that little goofball had managed to slip unseen over behind the tables underneath the desks really boggled the mind. If Mikey just converted that stealth into his training, they'd all be in for a surprise. The orange-banded turtle emerged from the shadows with a big grin and the Kraang Orb above his head, readying himself for the victorious strike that would give him enough teasing material so that Raph and Leo would never taunt him for the rest of the…week.

And with Donnie caught between the crossfire, Mikey could just rub that extra satisfaction into his intelligent brother's face. With that last thought, Mikey released a loud 'booyakasha!' before leaping into the air and sending the piece of alien technology crashing onto his three brothers.

Donatello hadn't even enough time to yell a 'Wait, Mikey!' before the Orb crashed onto his plastron and knocked the air out of him.

Horrified, he lost his grip on his retro-mutagen.

Closing his eyes, he felt the burning sensation raining down upon him like acid, painfully and agonizing and the weird part was that he wasn't screaming alone.

As he landed violently on the floor next to his brothers in a mass of pain, he could feel his mind spinning and his eyes rolling over to welcome the darkness.

A/N: owo Very short start xDD The chapters will be longer, hopefully. My first chappies are always short –w-