What A Strange Side Effect

Fandom: BNHA

Pairing: Bakugo/Shinso/Aizawa/Deku

Rating: Explicit

Tags: Noncon to dubcon, ABO, Alpha!Bakugo, Alpha!Shinso, Beta!Deku, Alpha!Aizawa, foursome

Summary: Deku develops a tumor that is, thankfully, benign but unfortunately, it makes him smell exactly like an Omega in heat

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“G-Guys, seriously!” Deku squeaked, his eyes stretched open wide, “I’m not an Omega-! You can’t get me pre-MMNGGH?!”

Pushing out a harsh breath through clenched teeth, Shinso shoved his thick, stiff cock between Deku’s plush lips, pushing it deep into his mouth. The bulbous head banged against the back of his throat, making him gag slightly. Stinging tears welled up in the corners of his eyes. He clutched at the loose material of Shinso’s trousers, holding on tightly as he slipped in deeper and deeper, only stopping when Deku’s nose was smooshed into a thick patch of lavender colored pubic hair. Large, calloused hands roamed over his naked chest and belly, smoothing across the scarred skin before darting up to teasingly pinch, roll and pull on his nipples. Deku squealed around the thick length stuffing his mouth full. He unconsciously thrust his chest upwards - a motion that Aizawl-sensei took as invitation to dip down and firmly rub his tongue against one of the hardened nub while his worn fingers mercilessly played with the other. Moaning loudly, sharp sparks of tingles racing through his body, his stiff cock twitching in the tight grip of Todoroki-kun’s fingers, Deku tried to grab hold of Aizawa-sensei’s hair to pull him away but before he could catch hold, something very big, very hot and very hard pressed to his entrance.

Deku’s eyes bulged. He tried to clamp his legs close, only to collide with a very solid mass between them. Exhaling shakily, Shinso-kun slipped back until just the head of his dense cock was in his mouth. Deku sucked in a deep breath, filling his burning lungs with air. He’d been so distracted with Aizawa-sensei’s and Todoroki-kun’s teasing that he completely forgotten that he hadn’t been able to breathe with that stupidly big thing in his mouth! The overly sweet scent of nitroglycerin flooded into his nose. Deku’s eyes, somehow, widened even further. Twisting his head around, he managed to shake Shinso’s cock out of his mouth. Jerking away when Shinso-kun tried to grab hold of him, he wrenched his head up to find his suspicions true. Kneeling between his legs, his handsome face flushed a brilliant shade of scarlet, was Kacchan. Deku gawked up at him. K-K-Kacchan too?! No way...there was no way-! This...this had to be some kind of bizarre dream-! There was no way that-!

“Oi, stop struggling.” Kacchan growled, shifting in even closer. Deku squeaked loudly as the tip of his cock slid inside of him. Mouth hanging open, his gaze dropped down to Kacchan’s crotch then shot back up to his sweaty face. Their eyes met. Kacchan stared silently at him for a moment then the corners of his lips curled up into a slight, amused smirk. Chuckling huskily, he murmured, “Not an Omega, huh? Wanna tell us why you smell this good, huh?”

“T-Tumor!” Deku squawked, “You heard me talking about it before, right?! This...this is one of the symptoms! In the glands or something! Very rare! Makes me smell like an Omega and everything but I’m not!” He forced a shaky grin, “You don’t wanna do this! Really! I’m not an Omega! So just-!”

“Don’t really care.” Shinso breathed, tracing the tips of his fingers along Deku’s jaw. He bent down to press a soft kiss to his temple, “You’re so cute...can’t stop…”

“I’m not usually interested in my own students.” Aizawa-sensei sighed, lifting his head from Deku’s crotch. He slowly dragged his tongue across his bottom lip then smirked, “I’ll make an exception for you. If I don’t devour you know, it’ll bug me forever.”

“S-Sen...sei…”

“Hurry up, Bakugo.” Todoroki-kun, who was still intently focused on Deku’s weeping cock, stated calmly, “I want my turn.”

“Yeah, yeah, shut the fuck up.” Kacchan snapped at him. Looking back to Deku, he smiled broadly, his brilliant red eyes gleaming with an intense heat that made Deku shiver in unexpected anticipation, “Better get ready, nerd. I’m gonna bred this stupid Beta hole until you become an Omega.”

A tremble of bubbling excitement thundered through Deku’s body, causing his breath to hitch. The heat blazing in his cheeks kicked up a notch, burning with such an intensity, he was shocked that there was steam pouring out of his ears. He wordlessly closed and opened his mouth a couple times, Kacchan’s words bouncing around wildly inside his muddled mind. His cock throbbed in Todoroki-kun’s hold. Grinning softly, Todoroki-kun leaned down to gently lap his tongue across the slit, gathering up a drenching of precum. Deku gasped, his hips bucking. Wa...wait, wait-! He...he wasn’t supposed to be feeling good right now-! Se-Seriously! This was a huge dilemma! If he didn’t do something, he was gonna-! Exhaling harshly, Todoroki-kun stretched his lips open wide, popping the head of Deku’s cock into his mouth. He clamped down firmly around him, unhesitatingly slipping all the way down to take in every inch of him.

“AAAHN!!” Deku wailed, throwing his head back. The heels of his boots scraped against the smooth floor. Shrieks of pleasure poured out from the base of his crotch, scorching through his body in a shockwave of heat. His-! His cock-! His cock was inside Todoroki-kun’s mouth-! Todoroki-kun was-!

“Bastard!” Kacchan snarled.

He grabbed hold of Deku’s hips, digging his blunt nails into his sweaty skin. Lurching forward, he forcibly rammed his hips forward, abandoning any semblance of gentleness to smash his cock deep inside of Deku’s ass. His heavy balls slapped against the pronounced curve of his backside. A loud, wet slap echoed through the empty training area as their bodies collided. Tension rippled through Deku’s violently trembling body. He slammed his feet down onto the ground, his hips straining upwards. The moan that came bubbling up his throat was abruptly muffled when Shinso-kun shoved his cock back into his mouth. He came as the smooth, veiny length pushed its way down into his throat. Blood roared like the crashing ocean surf in his ears. He distantly felt Todoroki-kun jolt but instead of pulling off, he buckled down, sucking hard on Deku’s length, swallowing down every drop of his orgasm. Deku squealed shrilly around Shinso-kun’s cock, one hand flying down to grab hold of Todoroki-kun’s surprisingly silky hair.

T-Too much-! Too much-! He...he had just cum-! He couldn’t-! It...it felt too good-! What...what was this?! He...he was a Beta! He...he wasn’t supposed to feel this good from being fucked by some Alphas-! This...he had to stop this but he...he couldn’t find the strength-! Good...fuck, fuck-! Ka...Kacchan’s cock-! So...so big-! So hot-! He was burning him up from the inside out-! And Todoroki-kun’s mouth...Deku shuddered as his tongue swiped across the underside of his dick, lightly rubbing against the pulsing veins. Bad...this was seriously bad…! He was-! He was gonna cum again right away if they didn’t-!

Deku squeezed his eyes tightly closed. Shuffling in closer, his breath coming fast and heavy, Shinso-kun began to shallowly pump his hips, keeping the majority of his cock buried deep in Deku’s throat. Foamy, bubbled drool leaked down his cheeks. At the same time, Kacchan spat out something that Deku couldn’t make out, tightened his hold on his hips and started thrusting, set a rough, harsh pace that sent him jolting forward every time his pubic bone slammed against him. Deku rocked back and forth, bounced about by the force of the two Alpha’s movements. Todoroki-kun, not about to be left out, pushed a hand between Deku’s quaking thighs to lovingly fondle his balls as he rapidly stroked his thrumming cock with his mouth. One of Deku’s hands was lead to Aizawl-sensei’s length. Calloused fingers wrapped it around the shaft and began to languidly slide it up and down. After a few strokes, Aizawa-sensei’s hand moved away, allowing him to unconsciously fall into repeating the motion. He distantly realized what he was doing but...between everything else, he...he couldn’t make himself stop-!

“Fuck-! Tight-! So fucking tight-!” Kacchan barked roughly.

“Does it feel good, Midoriya?” Shinso asked breathlessly, “You look like you’re feeling good.”

Todoroki-kun pulled off of his cock with a loud, lewd pop just long enough to pant, “He’s leaking so much. Tastes so good…” With that embarrassing statement delivered, he went right back to it, gobbling up his dick once more. Deku moaned loudly, squeezing his eyes tightly closed. Aizawa-sensei’s worn hands roughly fondled his tingling pecs, squeezing and kneading the soft mounds. His sweaty, calloused palms kept brushing across his swollen nipples, creating shockwaves of tingles that made something deep inside his chest burn. Hot breath brushed across his sweaty skin. A shrill wail bubbled up his throat as Aizawa-sensei clamped his broad lips around one of his nipples, nibbling lightly on the hardened nub. He thrust his chest upwards, writhing and squirming underneath the combined Alpha’s weight.

“Hah!” Kacchan exclaimed, “Like having your nipples messed with, huh? You tightened up so much right then.”

“Not just that.” Aizawa-sensei murmured, his low voice dripping with lust. “Look?”

Strong fingers curled around his pec, giving it a gentle squeeze. Deku wailed again, his legs trembling. Something-! Something was coming out of his nipple-! It...it felt...it felt so good-! His nipples were so hot and tingly-! Laughing huskily, Aizawa-sensei latched back on, applying an intense amount of suction to his overly sensitive nipples. Deku howled around Shinso-kun’s cock. His body spasmed, feet scraping clumsily against the floor. Good-! Good-! Being...being milked by Aizawa-sensei’s mouth felt so good-! He...he was drinking his milk-! Cu-! Cumming-! Cumming-! He was gonna cum while an Alpha was milking him-! He was-! Snarling harshly, Kacchan smashed his hips forward, completely sheathing his throbbing length deep into Deku’s hole. He grabbed hold of his knees, hefting his legs up, and began to rapidly, brutally pound into him. Deku screamed, vibrant colors flashing across his vision. Not to be outdone, Shinso-kun and Todoroki-kun sped up their pace as well, violently stimulating him from all ends. Deku frantically clung to the back of Shinso-kun’s trousers, desperate to have something to hold onto as the combination of three Alphas using him threatened to unravel his very being.

GOOD-! GOOD-! IT...IT FELT SO GOOD-! Kacchan’s big, hot thing was churning him up deep inside-! He...he was fucking him like he was going to bred him-! A shriek of crazed excitement tore through him, setting every nerve alight. He wanted it-! He wanted it-! He wanted to be bred by Kacchan-! He wanted all of them to breed him-! He wanted-! He wanted their cum-! It didn’t matter that he was just a Beta-! He...he wanted them to keep fucking him like he was an Omega-! He wanted them to fuck him so much that they turned him into an Omega-! Their Omega-! Their only Omega-! Shinso-kun choked out a strangled moan. He curled a large hand gently around Deku’s bulging throat, holding him in place as he smashed his hips against his face. Deku happily, dizzily sucked on his throbbing member. Cumming? Cumming? Were they going to cum?! Yes-! Yes, yes-! Together-! He wanted to cum together with them-! He wanted to cum with his Alphas-! He wanted to-!

“M-Midoriya-!” Shinso-kun cried out.

“T-Take it all, Deku-! Get pregnant-! Get pregnant-! Get pregnant-!!” Kacchan snarled.

Together, the two of them rammed forward, sheathing their cocks inside of his sloppy holes. A burst of scalding hot fluid gushed into his mouth and ass, pouring deep inside of him. Deku shrieked, the sound coming out as a muffled, gurgled mess. Blinding, crushing pleasure sailed through his body in a devastating tempest of ecstasy. He came for a second time in Todoroki-kun’s mouth, weakly bucking and rolling his hips. With Shinso-kun’s cock buried so deep down his throat, he wasn’t given the chance to swallow it. Still, just the sensation of that sticky heat pouring into his belly was enough for him (at least, for right then). Next time, though, he wanted to taste every drop. Panting heavily, the two pulled their still rock hard cocks out. Deku sucked in a deep, ragged breath. Drool streamed down his cheeks. He shakily lifted a hand and pressed it to his belly. Ka...Kacchan and Shinso-kun’s seed was inside him...it...it felt so good...He was so warm but he...he wanted even more…

“Don’t relax just yet.” Aizawa-sensei chuckled, carefully pushing Shinso-kun out of the way to take his spot. He grinned broadly down at Deku, his dark eyes gleaming with a barely restrained lust. Curling his broad fingers around the base of his dripping dick, he rasped, “I’m about ready to burst here.”

“M-Me too, Midoriya.” Todoroki-kun, flushed bright red and panting hard, gasped. He was a lot more firm than Aizawa-sensei, forcibly pushing his way between Deku’s legs, despite Kacchan looking as though he’d rather eat dirt than give up the position just yet. Snarling quietly, Kacchan scooted over so he was perched by Deku’s side. Pushing one large hand underneath Deku’s knee, Todoroki-kun lifted his leg up, giving him better access. A harsh tremble wracked Deku’s body as Todoroki-kun rubbed the tip of his sopping wet dick against his entrance. Deku gasped wetly, his heart twanging with delirious excitement. More...more, more, more-! He wanted-!

“You’ll work hard, won’t you, Midoriya?” Aizawa-sensei asked huskily.

“Y-Yes.” Deku gulped hard. He tilted his head back, stretching his mouth open wide. Hooking his fingers around the corners of his lips, he slipped his tongue out in invitation, “F-Fhuck meh likhe an Omehga!”