Kay, I'll be honest. Yes this is Sonadow, and yes I support it. *shrug*

Anywho, this won't be a face-sucking fiction, but...I'll let you guys read and discover things for yourself. XD

The first sensation that Sonic felt was the pain.

Now, he had felt pain before. Pain was a given when you were the Blue Blur, dancing across death's edge more than once. He'd been grazed, and very rarely hit, with bullets, pummeled by unforgiving metal, and slammed into the ground and walls of both rock and fortress. Every inch of his body had been bruised at least once. And he loved it. It always came with an adventure. The pain he experienced meant he was alive, which fueled his desire for more of it.

But this pain….this pain was different.

Sonic blearily opened his eyes. A dark and empty room greeted him, the ceiling and walls a dull concrete. There were no windows, only a few lowly lit lights hanging from the ceiling. And there was a door. A door cast in solid iron.

Oh great.

A wave of dizziness swamped the blue hero and he closed his eyes with a groan, raising his hand to his forehead.

Clank!

He blinked down with a mixture of surprise and dread at the thick chains that encased his wrists and feet; although "thick" was kinda an understatement. These were the industrialize chains meant for chaining ships to their docks. If these were holding him, then speed or not, he wasn't going anywhere.

He didn't have time to groan again as the pain seared so sharply he nearly gagged, his vision flickering.

"Uughblrgh!"

He'd had colds. He'd had the flu. He'd had sore throats that made speech downright impossible. He'd had sore throats that had burned like he's stupidly swallowed hot coals.

That…was a gentle tickle in comparison.

It was an ache that pulsed. It was a pain that scorched like hellfire. (And he would know about the temperature of that particular blaze, seeing as he'd run through a world practically bathed in the stuff once before.)

But this pain was so strange. It's throbs caused his stomach to twist with painful nausea, caused his head to swim and pound. He could barely find the strength to move against the weight of the chains pining him down.

He sighed grateful that speech didn't aggravate his razed throat. What had Eggman done to him? He couldn't remember how he'd gotten here, but that bloated scientist was usually the only one who would want to have Sonic the Hedgehog chained in a basement somewhere. Plus, Eggman was the only who could actually pull it off.

His ears perked up at the sound of approaching footsteps; muffled thuds of boots and the sharper clangs of metal. Speak of the devil…

Sonic hitched his trademark smirk onto his face, appearing to all the world like he was relaxed, almost dozing in his less that perfect state. He wasn't going to give the Dr. the satisfaction of−

The door opened, the heavy metal scraping and groaning in protest. Sonic squinted at the sudden influx of light, his eyes stinging much more than they should. Then, his bravado fell away as shock and confusion took its place. For framed in the doorway from the brightly lit hallway was a short figure whose distinctive red-tipped quills were pointed upwards. Beside him was a tall human, the helmet bearing the insignia of the G.U.N. obscuring his face. The same symbol was painted on the side of the lethal looking rifle pointed directly at Sonic's chest.

Sonic's mouth fell open. "What?"

Shadow's mouth pressed into a grim line at Sonic's hoarse whisper, easily heard to his ears. He turned to the soldier and nodded once. The human left without a word, the automatic rifle in his arms clicking softly as he walked away.

"Shadow?"

The Ultimate Lifeform locked eyes with Sonic once again, their ruby depths unreadable. Sonic licked his lips. His stomach felt heavy all of the sudden at the sight of the darker hedgehog. His heart throbbed and the pain in his throat twinged.

"Shadow…what's going on?"

Shadow arched an eyebrow. "You tell me. You're the one who's the cause of all of this."

Sonic stared at him. "What?"

Shadow closed the door, the iron hinges squealing in protest. Power rings gleaming in the lowlight, he walked towards the chained hedgehog, his hoverskates clanking dully against the floor. He stopped a good six feet away from Sonic, his arms folded, face set in a no-nonsense line. Now that he was closer and easier to see in the lowlight, Sonic tried to joke as he always did. He tried to steer things back into a place he understood. It didn't help that the pain was now steadily growing worse.

"So Shads, what happened to your face? I know you don't mark easily, or did you finally tackle with something you couldn't handle?"

Shadow's glare cooled several glacial degrees as he answered, his voice steeped in caustic sarcasm.

"Funny story actually. I was sent on a simple search mission when you marvelously sliced my face open."

Sonic stared at the long red gash that blazed across the others face, vivid against the apricot fur. He 'd sliced…What was going on?

"And as for whether I could handle it," Shadow continued, his eyes boring into Sonic. "It was much easier than normal to subdue you however it was quite a chore getting you here. You were thrashing about so erratically that it was downright impossible to fix the muzzle on you. Plus the shrieks you were making complicated things. Finally, we had no choice to sedate you and even that was difficult."

He sighed with annoyance at the memory, fixing the other with a disapproving eye. "You, hedgehog, have the metabolism of a demon. We pumped enough chemicals in you to take out a mammoth and you still refused to go down for another twenty minutes. It's amazing that you can be conscious now after such a short time, even more so that now you're somewhat sane."

There were several seconds ringing silence following this little speech. Sonic gaped at him, appalled and completely lost. And in pain. It was building, burning, making conscious though difficult as it demanded his attention.

"What are you talking about?" he asked, his voice unsteady.

Shadow shook his head in disgust. "Don't lie to me Sonic. You don't have the brain capacity for deceit."

Sonic barely heard him. His eyes were inexplicably drawn to Shadow's neck. The movements and motions of the muscles there seemed to move in slow motion before his eyes. The pain reached such a peak that sweat broke out over his temple. His breathing sped, becoming ragged. He struggled to focus, these sensations unknown and terrifying.

"Wh…what? I don't…"

Shadow's eyes narrowed as he studied Sonic, his body shifting to a defensive stance.

"You don't remember do you?"

"Re….remem…ber?"

The chains wrapped around his wrists clinked as his hands convulsed. His chest was openly heaving now. He closed his eyes, fighting to remove the image of Shadow's neck from his mind; the supple muscles flowing beneath midnight fur….

"You vanished over a month ago Sonic, and just recently returned yesterday." Shadow's voice resounded from far away.

"I…did?" He was burning.

"Yes. Howling and attacking anyone in sight."

This shocked him. Sonic opened his eyes in disbelief, his internal trauma forgotten for a moment." What?!"

"Yes. It's a miracle no one was killed!" Shadow growled, glaring at Sonic with a contempt that leaked into his voice. "And I am very interested to know why the world's greatest hero requires all of this."

Shadow swung out an arm at the concrete cell and the chains, his voice rising. The motion disturbed the air, blowing across Sonic's face.

The scent slammed into Sonic's senses, obliterating nearly his entire mind with the force of an atomic bomb. His throat erupted into flames hotter than the sun. His mouth opened, his teeth bared.

He lunged forward, his legs scrabbling against the chains to stand. The chain links clanged loudly against each other, but were drowned out by the unearthly keening snarl that was torn from his throat as Sonic thrashed. He heaved against the unrelenting chains again and again, howling as he strained to reach Shadow. He could hear it now, and wet pounding in his hear that was driving him berserk with pain and lust.

A pulse.

He wanted it. He needed it! He needed to have that pulse, he wanted to feel Shadow's flesh cave beneath his fangs! He needed the sweet treasure housed inside him that would make this pain go away!

….what was happening?!

A small part of Sonic's mind that still survived this madness was screaming out. What was going on? Why was he like this? What was wrong with him?!

Fear was growing larger, now dueling for supremacy against these alien instincts that dominated him.

The shrieks quieted to tortured moans as he shuddered violently, forcing himself to look away from the form that was causing this devastation within him! He shuddered again and bent forward until his forehead touched the ground, moaning in agony.

It hurts…It hurts, it hurts, it hurts!

Unaware that he had spoken aloud, he forced himself to stay there, using every ounce of the shattered will he still possessed to remain writhing on the ground. Sonic distantly heard the metal skates scraping against the concrete floor.

"Sonic…"

Sonic held back the scream as his muscles spasmed. Hearing his voice nearly sent him over the edge again. He could hear the vibrations of his vocal chords, hear the pulse in his throat like a siren song.

"Shadow…" he forced out the name in a tortured whisper.

"Shadow, what's happened to me?!"

Well, here we go. Let me know what you all think.
Running Rings will still be going as well, so dun worry. ^^