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The Enemy Within: A Supernatural fanfic +18

The fluorescent light buzzed above Ethan Kane’s head, casting a sickly yellow glow over the motel room’s faded floral wallpaper. He stood by the window, tugging absently at the collar of his worn leather jacket. Outside, the Nebraska town was dead quiet, save for the occasional rumble of a distant truck on the highway. The room smelled like stale cigarette smoke and despair, fitting for a place where people came to disappear.

Ethan’s fingers traced the edge of the photograph on the cracked wooden desk. A family of three, smiling under a streetlight. The wife’s face had been ripped off, her husband gutted, and their child—a little girl no older than six—disappeared without a trace. The crime scene photos were worse, but he didn’t need to see them again. The blood patterns, the ritual marks carved into the walls, they all told him the same story. Something inhuman had been here. Something ancient and powerful.

He folded the photo and tucked it into his pocket, his jaw tightening as he turned away from the window. His boots crunched against broken glass on the floor—leftover evidence from the last guests who hadn’t made it out alive. Ethan wasn’t afraid of dying, not anymore. But he hated this part of the job: the waiting, the tension that coiled in his chest like barbed wire.

The door creaked open behind him, and he spun instinctively, hand reaching for the gun holstered at his side. His trigger finger twitched when he saw the figure standing there, silhouetted by the dim hallway light. Tall, broad-shouldered, with an aura that made the air feel heavy, like the sky before a storm.

“Don’t shoot,” the man said, his voice low and smooth, like velvet scraping over steel. “I’m not here to kill you.”

Ethan didn’t lower his weapon. “You don’t look like housekeeping.”

The man stepped into the room, and Ethan’s breath hitched. Piercing blue eyes locked onto his, unnervingly calm. There was something about them, something otherworldly that made Ethan’s skin prickle. The guy looked human enough—dark hair, sharp jawline, a black trench coat that probably cost more than Ethan’s entire wardrobe—but there was no mistaking the faint shimmer around him, like heat waves rising off pavement.

“Name’s Cass,” the stranger said, tilting his head slightly. “Cassiel.”

Ethan’s grip on the gun tightened. “An angel? In Nebraska? What the hell are you doing here?”

Cass raised a brow, unimpressed. “Same thing you are, apparently. Hunting.”

“Not yours to hunt,” Ethan shot back, anger flaring hot in his chest. “Humans bleed just fine on their own without celestial meddling.”

Cass’s lips quirked into a faint smile, though his eyes stayed cold. “Funny. I was about to say the same thing about hunters.”

Ethan bristled, taking a step forward. “You got a lot of nerve walking into my investigation like you belong here.”

“Your investigation?” Cass echoed, crossing his arms. “You think you’re the only one who cares about what’s happening in this town? This isn’t some half-assed demon summoning. Someone’s killing humans to reclaim power. And if you’d bothered to look past your own ego, you’d realize you’re way out of your league.”

Ethan’s cheeks burned, but he didn’t back down. “And you think you can do better? Angels haven’t exactly been angels lately.”

Cass’s expression darkened, his lips pressing into a thin line. For a moment, the room seemed to grow colder, the air crackling with tension. Then, just as suddenly, the tension broke. Cass sighed, running a hand through his hair. “Fine. You want to play this game? Let’s play. But don’t come crying to me when your stubbornness gets you killed.”

Before Ethan could respond, a deafening roar shook the building. The walls trembled, and the lights flickered violently before going out altogether. Ethan barely had time to register the sound before the window beside him shattered, glass flying everywhere. He ducked, shielding his face with his arm, and cursed loudly.

When he looked up, Cass was gone.

Shit.

Ethan scrambled to his feet, pulling his gun from its holster. The motel room felt smaller now, claustrophobic, with the darkness pressing in from all sides. He reached for his flashlight, but before he could switch it on, a shadow moved in the corner of his vision.

“Looking for me?” Cass’s voice cut through the silence, closer than expected.

Ethan whirled around, flashlight beam landing squarely on Cass’s chest. The angel didn’t flinch, his blue eyes glinting in the harsh light. Ethan opened his mouth to tell him to watch his goddamn back, but the words never left his throat.

A guttural growl ripped through the air, and the ground shook beneath them. Ethan stumbled, catching himself on the edge of the desk. When he looked up, his heart sank.

The rogue angel loomed in the doorway, its massive frame blocking out what little moonlight filtered through the windows. Its skin was pale and cracked, glowing faintly with a sickly green hue. Blood dripped from its fingertips, splattering against the floor with a wet thud. Sharp teeth gleamed in a wide, predatory grin.

“Found you,” it snarled, its voice dripping with malice.

Ethan raised his gun, firing without thinking. The bullet hit the creature square in the chest, but instead of hitting flesh, it ricocheted off, embedding itself in the wall behind it. The rogue angel laughed, a sound so unnatural it sent shivers down Ethan’s spine.

“Is that all you’ve got?” it taunted, stepping closer.

Ethan’s mind raced, trying to think of a plan. He glanced at Cass, who stood motionless, his eyes fixed on the creature. The faint shimmer around him had grown brighter, his presence filling the room like a living flame.

“Cass!” Ethan barked, desperate for any kind of help. “Do something!”

Cass didn’t move. Instead, he tilted his head, studying the rogue angel with an eerie calm. “You’re bleeding grace,” he said softly, almost conversationally. “It’s killing you.”

The rogue angel’s grin faltered, its glowing eyes narrowing. “Shut up.”

“No,” Cass replied evenly. “You’re burning out. Even if you kill us both, you won’t survive much longer.”

Ethan didn’t understand what was happening, but he could see the effect Cass’s words were having on the creature. The rogue angel took another step forward, its movements jerky and erratic.

“Stay out of this,” it growled, its voice cracking.

“Make me,” Cass said, his tone as smooth as ever.

For a moment, it seemed like nothing would happen. Then, with a deafening roar, the rogue angel lunged.

Ethan reacted on instinct, diving out of the way as the creature barreled past him. He hit the ground hard, pain shooting up his side, but he ignored it, scrambling to his feet. He grabbed his knife from its sheath, ready to fight, but Cass was already moving.

The fallen angel stepped forward, his trench coat billowing around him as if caught in an invisible wind. His hands glowed faintly, runes appearing on his skin like tattoos coming to life. The rogue angel hesitated, its glowing eyes flickering between Cass and Ethan.

“Choose,” Cass said, his voice commanding. “Fight me, or run.”

The rogue angel snarled, its body trembling with rage. It chose poorly.

Ethan’s breath hitched as the rogue angel lunged at Cass, its massive frame cutting through the dim motel room like a shadow come to life. The air crackled with tension, the faint hum of celestial energy filling the space between them. Ethan tightened his grip on his knife, his eyes darting between the two beings locked in a deadly dance.

“Cass!” he shouted, but the fallen angel didn’t turn. His focus was razor-sharp, his movements fluid despite the creature’s erratic attacks. Runes glowed brighter on his skin, their light casting eerie patterns across the cracked walls.

The rogue angel snarled, its jaws snapping inches from Cass’s face. Ethan’s heart pounded, a mix of fear and something else he couldn’t name—something hot and primal that curled low in his gut. He hated this feeling, hated how helpless it made him feel, but he couldn’t tear his eyes away from the scene unfolding before him.

Cass sidestepped the creature’s strike, his trench coat swirling around him like a storm. His hand shot out, fingers brushing against the rogue angel’s arm, and with a sharp crack, the creature stumbled back, howling in pain. Its glowing eyes flicked toward Ethan for a brief moment, and for an instant, he felt naked under that gaze, as if the monster could see every secret he’d ever tried to bury.

“Stay back, Ethan!” Cass commanded, his voice cutting through the chaos. “This isn’t your fight!”

Not my fight? Ethan clenched his jaw, resentment simmering in his chest. Like hell it isn’t. He wasn’t some bystander, some fragile human waiting to be saved. He was a hunter, damn it, and if Cass thought he’d just stand there and watch while the bastard almost took his head off…

Before he could think better of it, Ethan surged forward, his boots slamming into the fray. The rogue angel swung wildly, its claws raking the air where Ethan had been a second earlier. He ducked, his body moving on pure instinct, and brought his knife up in a smooth arc. The blade connected with the creature’s side, sinking deep into flesh that sizzled and smoked upon contact.

The rogue angel screamed, a sound that scraped at Ethan’s nerves like rusty nails. He yanked his knife free, ready to strike again, but Cass was already there, his presence commanding and unyielding. The fallen angel’s glowing runes flared brighter, their light almost blinding, and with a single motion, he shoved the rogue angel back, sending it crashing into the far wall.

“I told you to stay back,” Cass said, his tone sharp but not unkind. His blue eyes met Ethan’s, and for a moment, the world seemed to shrink down to just the two of them. The intensity in those eyes was overwhelming, a mixture of anger and something softer that Ethan couldn’t quite place.

“Yeah, well,” Ethan retorted, his voice rough, “looks like I’m making this my fight now.”

Cass’s lips twitched, almost like a smile, but the expression was gone as quickly as it appeared. The rogue angel was stirring, its massive form shifting as it pushed itself off the floor. Its glowing eyes fixed on them, fury burning bright within its hollow sockets.

“Stay close,” Cass murmured, his voice low enough that only Ethan could hear. “And whatever you do, don’t look away.”

Ethan nodded, though the command made his stomach twist. He didn’t like being told what to do, especially by someone who—what? Wasn’t even human? But as he moved to flank the creature, his pulse quickening with each step, he found himself oddly comforted by Cass’s presence. The fallen angel was calm, steady, a counterpoint to Ethan’s own frantic energy. It was strange, how easily they fell into sync, despite their differences.

The rogue angel charged, its roar deafening. Ethan dove to the side, rolling to avoid its massive claws, while Cass stepped forward, his hands glowing with celestial energy. The runes on his skin pulsed, their light growing brighter with each passing second. The creature tried to dodge, but Cass’s movements were precise, calculated, and with a flick of his wrist, he sent the rogue angel stumbling backward once more.

“Now!” Cass barked, his voice cutting through the chaos.

Ethan didn’t hesitate. He lunged forward, his knife aimed at the creature’s exposed flank. The blade sank deep, and this time, the rogue angel’s scream was tinged with desperation. It lashed out, its claws grazing Ethan’s shoulder, but he gritted his teeth and held on, driving the knife deeper until the creature finally collapsed, its glowing eyes dimming to ash.

For a moment, there was silence. The motel room seemed to hold its breath, the only sound Ethan’s ragged breathing and the distant hum of Cass’s fading runes. He straightened, wincing as pain lanced through his injured shoulder, and glanced over at the fallen angel.

Cass was watching him, his expression unreadable. Then, slowly, he stepped closer, his movements measured and deliberate. Ethan tensed instinctively, his bodyprotest ing to the proximity, but he didn’t move away. Couldn’t move away. There was something about the way Cass looked at him, something that made it hard to breathe, hard to think.

“You shouldn’t have done that,” Cass said finally, his voice soft but laced with warning.

“Yeah?” Ethan challenged, his voice rough. “Why’s that?”

Cass didn’t answer right away. Instead, he reached out, his fingers brushing against Ethan’s injured shoulder. The touch was fleeting, almost accidental, yet it sent a jolt of awareness through Ethan’s entire body. Heat pooled low in his belly, and for a moment, he forgot how to breathe.

“Because,” Cass murmured, his voice dropping dangerously low, “you could’ve gotten yourself killed.”

Ethan swallowed hard, his throat suddenly dry. “I guess we’ll never know, will we?”

Cass’s eyes darkened, the blue seeming to burn brighter in the dim light. Without warning, he closed the distance between them, his body pressing lightly against Ethan’s. The fallen angel’s scent invaded his senses—something clean and otherworldly, mixed with the faintest hint of smoke. It should have been strange, wrong even, but instead, it felt like coming home.

Ethan’s breath hitched as Cass leaned in, his lips brushing against Ethan’s ear. “You’re reckless,” he whispered, his voice a low purr that sent shivers down Ethan’s spine. “But I suppose that’s part of what makes you… fascinating.”

Ethan’s pulse raced, his brain struggling to keep up with the rapidly escalating situation. “Fascinating?” he repeated, his voice barely above a whisper. “That’s one way to put it.”

Cass pulled back slightly, his piercing gaze locking onto Ethan’s. There was something in those eyes—something raw and unfiltered—that made Ethan’s heart pound harder. The tension between them was palpable, a living thing that crackled in the air like electricity.

“Tell me, Ethan,” Cass said, his voice dripping with temptation, “what would you call it?”