Monsterous - G01NGP0ZT4L - Metalocalypse (Cartoon) [Archive of Our Own] (2024)

Charles is swamped with paperwork, as per usual. The door opens, snapping him out of his focus. It’s Nathan.

“Ah, hello, Nathan. What do you need?” He looks up at him, noticing a vanant look in his eyes, his sheer size, his newly acquired claws, and the long gator tail protruding from him. He’s absolutely massive. He comes around the desk and approaches him. “Are you alright?”

Nathan doesn’t reply to his question, mumbling out something.

“Nathan, you need to speak up.”

“...Need you.”

“In, ah, what way?” He gets no response. “Nathan?” Nathan shoves him against the desk, causing Charles to groan out in pain. He starts unbuttoning Charles’ suit jacket, and Charles’ eyes widen. “Oh, I see. Ah… Alright, then.” He adjusts his glasses, watching Nathan’s large hands work on his suit. He loosens Charles’ tie and tears open the shirt underneath, startling Charles. “Nathan, that shirt was expensive.”

“Don’t care.” He leans down and bites down on his collarbone. Charles moans softly. Nathan leaves a hickey where he bit, moving up and biting down on the front of Charles’ throat.

“Nathan, I-I…Oh, god…” Charles covers his mouth, face red. Nathan leaves a hickey there, too.

“Mine.” Nathan mumbles out. Charles shivers. Nathan fights with Charles’ belt, before giving up and moving to rip open his pants, tail whipping angrily.

“Wait, let me do it.” Charles undoes his belt, unzipping and unbuttoning his pants. Nathan yanks them down, taking his underwear down with. Charles sits on his desk, and Nathan shoves him down.

Charles grunts. “Easy…” Nathan ignores him, leaning down and leaving hickeys all across his stomach and chest. Charles huffs beneath him.

Nathan slowly moves down, starting to leave hickeys on his thighs. Charles squirms, whimpering. He clamps a hand over his own mouth, moaning softly. “Nathan…”

“You belong to me.” Nathan growls out. Charles huffs.

Nathan goes down even farther, licking a stripe up his taint. Charles huffs, watching him. Nathan slowly inserts his tongue into Charles, hands coming up and spreading his cheeks. Charles lets out a soft moan. His tongue is rough, but it feels amazing.

“Nathan..” Charles whispers out. Nathan claws across Charles’ ass, drawing pinpricks of blood. His tongue reaches farther than a standard mans’ would. Just another addition to his monstrous nature. Charles squirms as he’s tongue-f*cked. After what seems like forever, he pulls his tongue out, breathing heavily. Nathan pulls out his co*ck and lines himself up.

“W-Wait.” He stretches to reach the top cabinet of his desk, pulling out a small bottle of lotion. “Here.” He hands it to Nathan, who applies just enough of it to his dick. He quickly thrusts into Charles, who gasps loudly. “Nathan! G-Gentle…” He swallows wetly. He’s huge, and he feels fantastic, being stretched to his limit.

“Feels good…” Nathan mutters out. He leans over Charles, hands on the desk, and starts thrusting, fast. Charles moans loudly.

“Oh my god, Nathan!” He moans out, back arching. Nathan f*cks him deeper, faster, harder. Charles sees stars. “f*ck, Nathan!” He cries out.

Nathan grunts in response, a sharp-toothed grin creeping across his face. He leans down, biting hard into Charles’ thigh, drawing blood.

Charles groans loudly, placing a hand on Nathan’s head, tangling his hand in his hair. “Nath- I- I- Holy sh*t!” He moans out, absolutely cumbrained. He babbles nonsense, punctuated by drawn-out moans.

“Shut up. Gonna get caught.” Nathan rumbles out, clamping a hand over Charles’ mouth. Charles grabs his wrist, gripping tight. Nathan claws up Charles’ thigh, drawing blood.

Charles lets out a loud whimper as he c*ms, wrapping his legs around Nathan and squeezing. Nathans not even close to finishing, pulling out and flipping him over. He slams back into Charles, grabbing him by the waist. Charles moans loudly, covering his mouth.

Nathan wraps an arm around Charles throat, pulling him up against his chest. Charles chokes out a moan, gripping Nathan’s arm. He cries out as he’s animalistically f*cked. He brings a hand down to feel the vague bulge of his stomach. So good.

“Nathan, please!”

“Want more?” He growls into Charles’ ear.

“Yes!” He moans out. Nathan f*cks him faster, faster than he’s ever been f*cked. He yells out in pleasure, going limp in Nathan’s grasp.

“Look at you, f*cked out of your mind.” Nathan whispers into his ear. Charles whimpers and whines beneath him, voice hoarse. Nathan slams into him, growling as he c*ms. Charles pants loudly, holding onto Nathan’s arm. Nathan leans against him, causing Charles to place his hands on the desk.

“We, ah…” Charles clears his throat, voice scratchy. “Should do that again…”

Nathan lets out a soft ‘mhm’, face buried in Charles’ back.