Sticky Situation
Summary: When a tentacled Noumu with the power to show people their wildest dreams is set loose on the city, Katsuki comes face to face with exactly what it would be like for Deku to use his body with Blackwhip. noncon because hypnotism, tentacles, Noumu/Katsuki, but also still somehow dkbk; Written for BNHA Monsterfucker Week 2021, Free Day; Happy Halloween!
Happy Halloween, everybody! Don't take this too seriously. I just wanted to write something horny for Monster Fucker Week. Hope you enjoy!
Katsuki blasted himself across the sky, scanning the city below for anything out of the ordinary. A disturbance had been reported in the area, and he was the closest Pro Hero to the scene.
From the description in the report, he suspected that a Noumu was on the loose. It was unclear exactly what quirks the creature had, but it didn't matter. He didn't plan on waiting for backup to arrive. Any second he waited could be the difference between life and death for its victims.
A scream pierced the air. "Help! Help me!" a woman cried, heels clacking hurriedly against the asphalt.
Katsuki immediately shot himself toward the noise. By the time he touched down into the dirty alley, however, the woman had already fallen silent. She lay on the ground next to a dumpster, her handbag untouched beside her.
Katsuki scowled and looked around wildly, searching for the source of her fear. Strangely, every direction seemed empty. It was as if the thing she had been running from had completely disappeared.
He cautiously leaned down to check her pulse. She appeared to be in a deep sleep, but there was a smile on her face. He reached out for her, planning to take her to safety, but that's when he finally heard the sound of wet, labored panting behind him.
Katsuki whirled around, arms up and ready to defend himself, but it was useless. The second he looked into the creature's crazed eyes, he was paralyzed. He fell to his knees, suddenly dizzy.
The dark creature walked toward him slowly, a disturbing grin on its face. It stood over him, its many tentacles raised and ready to strike as he fell into unconsciousness.
When Katsuki woke up, the creature was gone and so was the woman.
"Dammit!" he shouted, rubbing his head. "What the fuck?" He couldn't believe the villain had snuck up on him like that.
"Kacchan, you okay?" asked a familiar voice beside him.
He looked up into the kind, worried face of his childhood friend, and incidentally, the man he'd been pining after for years.
Katsuki groaned. "Don't say a damn word. Just help me find the girl." He scrambled to his feet, ready to jump right back into action despite still feeling woozy.
"It's alright, Kacchan," Deku reassured him gently. "We found her before we found you. The Noumu's already been apprehended, so just… rest now."
Katsuki sighed in annoyance. "I've rested enough."
Before he could launch himself back into the air, Deku grabbed his arm. "Wait…"
Katsuki looked down at where Deku was holding him and then back into his eyes. He was surprised by the desperation he saw there. Deku had never looked at him like that before, eyes wide and hungry.
"Spit it out," Katsuki grumbled, pushing down the uneasy feeling in his stomach. "What d'you want?"
"Do you wanna have sex?"
The question was so forward, and so unlike Deku, that Katsuki's brain short-circuited for a moment.
'The fuck? Since when are you even gay?' he wanted to ask. He felt his mouth move to form the words, but nothing came out. There was so much he wanted to say, so much history between them that couldn't be ignored. He had too many questions, too many swirling emotions.
Even so, he felt like it was physically impossible to deny the man in front of him. Why would he even want to? It was Deku, finally giving him what he wanted after all this time.
"Fuck yeah," he said, feeling his lips move before he truly realized what he was saying. He felt off-balance somehow, like he wasn't in his own body anymore.
Deku smiled, his expression bright and full of adoration, the spitting image of how Katsuki always saw him in his dreams. He would do anything to see Deku look at him like that all the time.
Before either of them could say another word, Blackwhip shot out from Deku's body and wrapped itself around Katsuki's wrists and ankles. It effortlessly lifted him off the ground, pinning his wrists to the dirty brick wall behind him and spreading his legs wide.
"Good boy," Deku cooed, the unnerving hunger back in his eyes. More tendrils raised above him, and for a short moment, Katsuki felt like he had deja vu. It was as if he'd forgotten something important, but he couldn't think of what it was. He frowned, blinking as if he was trying to clear his vision. Everything seemed muddled somehow.
Blackwhip slithered up his shirt and down his pants, pulling and tugging at his hero suit until it ripped open in several places. He shivered at the sudden change in temperature, his boxers and heaving pecs suddenly on display for all to see.
Blackwhip wasted no time invading his clothes, wriggling against him like a worm. It rolled over his skin, mapping out his entire body and wrapping around it until he was completely trapped.
He shivered again, but this time, it was for an entirely different reason. Slimy tendrils slid into his underwear. They probed gently at his hole and curled lazily around his cock. Despite the disgusting feeling of being groped, he felt himself bucking into Blackwhip's touch.
"Deku," he moaned softly, looking up into the eyes of the man he adored.
Deku continued to smile at him, unmoving. He made no effort to touch Katsuki with his hands. He only stood there, watching with lust-filled eyes as Katsuki hung in the air, hips jerking forward impatiently.
"Stop fucking teasing and just do it," Katsuki demanded.
Deku chuckled. "Don't be so greedy, Kacchan. You've been fantasizing about this ever since you heard about Blackwhip, haven't you? It's been years. You can wait a little longer."
Blackwhip began to secrete a sticky, viscous liquid against the cleft of Katsuki's ass. Normally, Katsuki would've questioned how such a thing would've been possible, but for some reason, the situation didn't seem strange to him at all.
Completely powerless against Deku's mighty grip locking his arms against the rough brick behind him, all Katsuki could do was hang there and take it as Blackwhip rubbed back and forth between his ass cheeks. Katsuki shivered and pushed back against the tendrils eagerly, but no matter how much he tried to get them to go faster, it was no use. They continued to gently knead his ass and tease his hole mercilessly, forcing him right to the edge of insanity.
Katsuki let out a grunt of frustration and pulled at his restraints. He was dying to cum. "Hurry up!" he barked. He couldn't stand it any longer. He needed Deku inside of him.
One of the tendrils began to massage itself against him faster and faster until, finally, it squirted all over his backside. As it came, it positioned itself right at Katsuki's hole and slid inside, causing Katsuki to groan loudly in relief as he was pumped full. The more slick liquid it produced, the easier it was for it to push further into his body.
Katsuki tensed, but he took it all without complaint. He moaned, long and deep.
It felt like Katsuki was in a dream that was long overdue. He could barely feel the scrape of brick against his back every time Deku pushed into him. All he knew was that his fantasies were finally coming true.
One tendril of Blackwhip alone wasn't very thick, but several more battled each other for the honor of being inside him. They writhed and snaked into him intermittently, one by one, until he was constantly stuffed full. As one pulled out, there was always another to take its place.
Katsuki moved his hips as much as Deku's tight hold on him would allow. His greedy ass sucked in everything it was given.
It wasn't until he heard footsteps nearby that he was finally startled back to reality.
"Uravity is the best rookie hero right now!" a woman's voice insisted.
"No way! Shouto is gonna be number one someday, just like his father! I'm sure of it!" a man grumbled back.
Katsuki's stomach dropped, and a combination of anxiety and excitement rushed through him. What was he doing? He was in an alley, where anyone could see him, and he was letting Deku fuck him with Blackwhip right next to the trash like a cheap whore.
Deku smirked. "Does that turn you on?" he asked, not even trying to keep his voice down. "Do you want your fans to see you like this, stuffed full of my tentacles like a common slut?"
Katsuki's heart pounded, and he had to bite his lip to keep from whining in response.
Deku was unperturbed by the strangers that seemed to draw closer and closer with each second. He kept sodomizing Katsuki at an increasingly brutal pace. The rest of his long, black tendrils continued to glide over Katsuki's chest and squirm around his cock.
"If you don't wanna get caught, then be quiet," Deku ordered. Another mass of tendrils shoved itself into Katsuki's mouth, effectively muffling his grunts of pleasure.
The strangers reached the entrance to the alley, and for one terrifying moment, Katsuki could see them, plain as day. If they turned to the side, even a little bit, his hero career would be over.
"You're both wrong," another of the women said, shaking her head. "Dynamight may be a little abrasive, but don't let that fool you. He's the coolest one of them all!"
Katsuki's cheeks burned in shame, and his eyes rolled back into his head from the effort of keeping silent. His body spasmed wildly, desperate for release. He willed himself to disappear until it felt like he didn't exist anymore. He was nothing but a hole for Deku to use.
Luckily, the extras kept walking by, completely unaware. They continued down the street until they were out of sight. Katsuki didn't stop holding himself back. He let the pressure build up more and more until the sound of their laughing disappeared completely.
Finally, he let go.
He sobbed around the tendrils in his mouth as Blackwhip writhed against his prostate and sent a shudder through him. His body trembled as cum shot from his cock, staining his hero suit.
Blackwhip finally pulled out of his mouth and came all over his face. Katsuki stuck out his tongue and licked his lips, panting heavily.
Shallowly bucking upward one final time, he sighed and sagged into the tendrils that still held him aloft. Blackwhip withdrew completely, and Katsuki felt slime drip from his asshole onto the asphalt below.
He felt relaxed, drugged even. He could've easily drifted to sleep.
Deku, however, had other plans. He chuckled, dark and low, as Katsuki felt himself being flipped over, and his ass was pushed up into the air.
Katsuki looked behind him and saw that Deku had unzipped the front of his own hero costume. His dick sprung forward, hard and ready.
"I'm not done with you yet, Kacchan," Deku said. "This is just too much fun."
Blackwhip pulled Katsuki's ass cheeks apart, allowing for Deku to finally push his own cock inside. Several tendrils wriggled in alongside him, causing Katsuki to let out a short grunt of surprise.
His exhaustion didn't last long. He fucked himself back into Deku and groaned, eager for more. He wouldn't be satisfied until Deku was finished with him.
Izuku quickly jumped from building to building, green lightning crackling all around him as he went. The Noumu he was looking for was dangerous. It had an invisibility quirk, and even a tentacle quirk, but neither of those were the worst part. It apparently also had a hypnotism quirk that was able to lure people in by making their wildest dreams come true.
Katsuki hadn't answered his phone in hours, and with such a savage creature on the loose, Izuku was beginning to get worried. Everything seemed too quiet. His eyes searched the city below as he went, hoping to find the man he'd had a crush on since middle school.
Finally, Izuku found Katsuki, but he heard him before he saw him. Loud groaning echoed from an alley nearby that sounded like Katsuki was being attacked. Izuku didn't have time to question it before he jumped toward the noise.
He landed in the alley next to a woman who lay on the ground, fast asleep. She had bags under her eyes, but her face was still and serene as if she was finally getting some much-needed rest.
He didn't look at her for very long, however. He whipped around, eyes wide as he came face to face with Katsuki.
"Fuck me harder, Deku! Fuck me!" Katsuki sobbed. He was completely wrapped in jet black tentacles, his costume torn to shreds. Suckers pulled at his skin and hung him aloft as he bounced on the Noumu's massive cock. He panted and moaned with every thrust, eyes unfocused.
Izuku's mouth hung open in horror, but he didn't waste another second. Before the Noumu could react to his presence, he bounced off the nearest brick wall and slammed a United States of Smash directly into the exposed brain on the creature's head. He didn't hold back any of his power, determined to save Katsuki from the strange fate that had befallen him.
The Noumu's crazy eyes fell closed, and it slumped over, its tentacles falling slack and retracting back into its body.
Katsuki didn't seem to feel the impact of the asphalt as he fell onto the ground. Instead, he seemed to finally spot the real Izuku.
"Deku!" he exclaimed. He crawled toward him, turning around and presenting his ass, desperate to continue getting fucked. "More! Fuck, just please, give me more."
Izuku was speechless. He'd always wanted Katsuki to say his name like that, but he never would have imagined it happening in such a way.
He scooped Katsuki into his arms and took off into the sky before anyone else could see him in such a state. He'd make sure that someone else took care of the Noumu and the woman, but for now, they had to get out of there.
They had a lot to talk about later when the quirk's effects finally wore off.