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Hot-Blooded Half-Devils

Summary:

“How come you’ve never asked to have sex with me?”

“Huh?!?” Denji exclaimed.

“What?” Power asked, frowning and raising an eyebrow. “We know each other better than anyone now.”
——————
AU where Power and Denji are both 18.

Notes at End.

Notes:

(See the end of the work for notes.)

Work Text:

“Ok, Denji,” Power said, slamming the door to Denji’s room shut.

Denji shot up from his bed, his heart—or perhaps motor—skipping a beat from the noise and being woken up from half asleep. The disappointment and scorn filling his face when he saw it was just Power made her grin.

Denji flopped back on his pillow. “What is it, Power?” he groaned.

“Aki’s out and I’m hungry,” Power answered, sitting on the edge of the bed and flopping across Denji’s stomach.

“Oomph!” Denji coughed. “Hah? So? What do you ‘xpect me to do about it? Especially—“ Denji coughed, “—from here…”

“Go make me food, human!” Power ordered. She crossed her arms and didn’t make any effort to get off Denji’s stomach at all.

Denji huffed, scooped his hands under Power, and flipped her upright, darting out of the way before she could fall onto him again.

“Agh, no fair!” Power exclaimed.

“Didn’t Aki leave stuff in the fridge?” Denji asked.

“Smells bad.”

“What kind of bad?”

“Vegetables.”

Power curled against him. Denji was used to Power’s little touches by now. Aki and Makima said it had something to do with her being the Blood Demon and needing heat or something. The touches had been a lot at first, especially when Denji had mostly touched other people when fighting them before. But he got used to it. Most disturbingly, he felt weird when he and Power split up for a day or more and he couldn’t feel her there anymore. It wasn’t a flustering or longing ache, though. It was a small version of how he felt when he first lost Pochita. It was… being alone again.

Denji got off the bed and headed to the kitchen, staring blankly into the fridge. Sure enough, it was stocked with tupperwares of vegetable curry. Truly unacceptable to two blood fueled half devils.

“See?” Power said, flopping an arm over his shoulder.

“Ugh,” Denji said. “Guess I’ll order us something.”

Power huffed in agreement.

The two weren’t allowed smartphones, so Denji grabbed the house phone and the collection of menus sitting next to it and started trying to make sense of them. Power flopped on the couch.

“Denji,” Power said.

“Uh-huh?” he answered. He realized he felt her eyes on him.

“How come you’ve never asked to have sex with me?”

“Huh?!?” Denji exclaimed. His wide eyes met Power’s intent gaze, and the phone slipped from his hand.

“What?” Power asked, frowning and raising an eyebrow. “Didn’t Makima tell you sex stuff is better when you know someone well? We know each other better than anyone now.”

Denji furrowed his brow. “I guess. But I want my first time to be with Makima! I told you that too, right?”

Power glared, stood up, and marched to Denji, leaning over him as much as her small frame allowed and slamming a hand into the wall by his head. “Do you know Makima as well as you know me?”

“Well… I touched her boob once.”

“One boob or both?” Power demanded.

“Just one…” Denji confessed.

“Ha! So you've touched half as many of her boobs as you have mine!” Power smirked.

Denji’s face was red and hot. He couldn’t… Power was Power, right? But… she *was* hot. Especially like this.

“Denji, We fight together. We eat together. We live together. We’ve tried all sorts of new things in this stupid new life together, right?” Power said. She leaned in. Her breath stank, but not too badly. Their lips were inches apart, and her face was as red as Denji’s. “I want to learn this with you, too.”

It was true there was no romantic tension between them. There were no butterflies, no feelings of adoration, just the bond Denji and Power shared. But Denji couldn’t ignore the desire tensing in his core.

Denji leaned forward and kissed her. There was no vomit this time. He didn’t even think of it, just the bitter, slightly sour, iron tinged taste of Power. Warmth filled his mouth and shot down to his stomach.

He pulled away, and had to flinch away from Power’s protests for a moment. “Okay,” Denji said. Denji ran a thumb along Power’s ear, as Makima had shown him once, and smiled when Power shivered under the gentle touch. “We can try it.”

Power grinned, smug and hungry as always, then cupped his face in two hands and pulled his mouth to hers. Their teeth clattered together as their tongues explored the new sensations.

Power kept pulling, even as Denji’s hands clumsily grabbed her waist, until the back of her knees found the couch. The rush of her lips against Denji’s as she fell into the cushions was everything she’d hoped for. Denji scrambled to find a new balance on top of her, his hips against Power’s. Even through their clothes, Power felt the heat building there in both herself and Denji.

Denji pulled away, propping himself up on his hands. His eyes opened wide as saucers, and he stood still, panting, taking her in, uncertainty written all over his face. Power grinned. If she’d known this was all it took to shut Denji up, she’d have propositioned him a lot sooner.

“W-What do we do now?” Denji asked. He almost looked like Kobeni.

Power raised an eyebrow. “Eh? You don’t know? Aren’t you obsessed with this stuff?”

Denji blushed and looked away. It took all her strength for Power not to grab him and kiss him again.

Power huffed and pulled her t-shirt up over her head. “Take your clothes off, Dumbass.”

Power wondered for a moment why Denji didn’t move, and blushed even redder, then realized his eyes were locked onto her fully exposed chest. Power rolled her eyes, but couldn’t help smiling to herself.

“Oi, Denji,” Power grinned, “Touch me.” she grabbed one of his hands and placed it over her tit. His hand was rough and warm, much more so than when she’d felt it through her bra. It was a deeply pleasant sensation, and it only made Power hungrier.

Denji looked her in the eye. “What do… without making me… do anything first? What do you want?”

Power felt a different heat flare up from her chest, and she snarled. “I want this. I want you.”

“Are you sure?” Denji asked, the question soaked in the life of a lonely kid who only knew how to be used. It made Power so angry.

“Not everything’s a deal with me, Denji,” Power said. “I’m not Makima. I just like you.”

“You- You do?”

“We are… friends, yeah?” Power shrugged, and found it was her turn to blush and look away. “I swear if you tell anyone I said that I’ll k— mmmph!!”

Power wasn’t expecting Denji to kiss her. He just pressed his lips into hers for a long moment, nothing more. But it felt so good with his hand on her breast, with his heat and weight pressing into her skin. The closest thing Power could compare it to was curling up with Meowey in the forest with the sun poking through the leaves.

Denji pulled away, still struggling to maintain eye contact. “Thanks, Powy.”

Power blushed at him using her nickname in this circumstance, but recovered with a wide smirk. “Take off your pants, Denji.”

“Right!” Denji said, hurrying to obey.

Soon, their clothes lay strewn about the living room.

Power was still laying on the couch, but Denji sat up, his corded muscles taut and anxious.

Power smiled. “Denji.”

He looked, and Power spread her legs open towards him. Denji was a deer in headlights again, and Power laughed, then reached a hand down and traced a finger up and down her folds, drawing out her wetness. From what she’d caught of Denji’s cock, though Power had experimented with herself plenty, she was going to need all the lubrication she could get.

“You gonna fuck me or what?” Power grinned.

After another adorable moment sitting stunned by the whole situation, Denji crawled between Power’s legs. Having him over her, protective and predatory and shockingly gentle all at once, was everything to her. His thumb traced her ear again, then down her jaw, and drew her into a gentle kiss. His member caressed Power’s stomach, sending hot chills straight to her groin.

Denji’s hands journeyed down her body, rough fingers sliding over Power’s surprisingly soft torso.

“What are you doing?” Power asked, slightly annoyed her fuck had been delayed.

“Getting to know you,” Denji said, as if it was the most obvious thing in the world.

An arm hooked under Power’s leg and Denji lowered, kissing her inner thigh.

“AAaHk!!” Power yelped.

It tickled, and Power jumped and felt an almost involuntary cackle emerge from somewhere deep in her chest.

Denji had somehow managed to keep her leg from kicking out of his grip and was still exploring her thigh. Power grabbed his hair and pulled him away.

“Denji!! Stop, it tickles! and what’s taking so long? fuck me like i told you to!”

“But… Makima said that…”

“What? What did the Great Makima-sama say?” Power growled, sat up, and grabbed the base of Denji’s dick. He nearly keyed over. “To ‘get to know someone’ first? Well you already know me! So if you want this, stop putting it off and fuck me!”

Denji, still half immobilized from the touch, matched her snarl and glared into her eyes. “Fine. Just, Let… go… first… please…”

Power grinned and did as she was asked.

The next thing she felt was Denji grabbing both her tits and pushing her back onto the couch with a hungry kiss. As their tongues intertwined and explored mouths filled with sharp teeth, Power felt Denji’s hardness press into her crotch. She moaned into Denji’s mouth and arched up, grinding her clit into his shaft as best she could. It burned with pleasure. Denji’s breath, his mouth, his body, Power’s breath, her body… Everything was so warm.

Denji’s head fell into the couch, panting into Power’s neck, and he reached a hand between them. Carefully, he dragged his dick along Power’s folds, until the head was pressed just into her entrance.

“Are you sure about this?” Denji asked. His voice was steady and low. There was just a bit of uncertainty, but it was buried in tones of abyssal hunger. No, the question was for her. A last chance to back out.

Power half moaned and half snarled as she thrust her hips forward in answer. Her fingers laced into the mess of hair on the back of his head, and her legs hooked around Denji’s hips, pulling him further inside of her until his tip passed the first ring of muscle in her cunt. Power and Denji gasped in unison as they joined, her grip on his hair tightening fiercely. He was the thickest thing Power’d ever had in her hole for sure. He filled her up so perfectly, she thought. So warmly.

And then he started moving.

“Oh ffffuuuuck,” moaned Power.

Denji could barely do more than grunt. His arms shifted and he pulled Power tight against him, and Power felt the full, naked heat of his chest against hers.

Denji’s cock moved in and out, steadily pushing just a bit further in with each thrust. Then, he hit her cervix.

If what Power felt before was a fire, this was a sun. Power arched violently, her fingers digging into Denji’s back and hair. A whisper of a moan trembled from her mouth.

“Denji!!” was all she managed before he thrust in again, harder this time, and then harder again, and again, and again. Her body flailed and moaned and contorted in pleasure, but Denji held her tight and safe.

Steadily the pace and power of Denji’s thrusts increased, until Power felt her whole body turn into a hot coil of pleasure.

And then, she exploded. Heat tore through her. Her muscles relaxed in impossible waves. Her pussy gripped Denji’s cock tight in thrilling pulses and she screamed.

Denji’s hand clapped over her mouth. “Shut up! If the neighbors hear we’ll get in trouble!”

Power barely understood him. She moaned into his hand as her orgasm settled. Once she realized his hand was there, thoughtlessly, she bit it, holding it between her teeth.

“Nnnn Ten-ji…” she muttered into his hand.

“Oi, Power, I haven’t finished yet,” Denji said. He sat up, inviting a gasp of cool air across her skin and glaring at her sleepy, well-fucked expression.

“Mmm? And what are you gonna do about it, Denji?” Power hummed, smirking. He was so predictable sometimes, and she was going to enjoy this.

Denji scowled and pulled out. Power gasped at the sudden emptiness, and her hand went to her crotch as she instinctively rolled to one side. Then, she felt Denji’s hands on her hips, and his grin against her ear.

“Heh, predictable,” Denji gloated.

Denji pulled her hips back and up, and Power followed, until she found herself sat up on her hands and knees, her ass pressed up against Denji’s cock.

“You look amazing from here,” Denji said.

power blushed and looked over her shoulder to him. “What are you—“

His cock thrust all the way to her deep spot, and her words melted into a low moan. Denji’s fingers pressed into Power’s ass, moving her in time as he slammed into her again. Power’s arms collapsed underneath her and she buried her face and moans in the couch cushions as Denji began pounding her hard, fast and deep. Power felt as if his member might split her in half, in the best way possible.

“Oi, no napping on me,” Denji grunted. “You said you wanted to have sex with me, yah? So we’re doing that.”

Power felt a tug on her hair, and then a pull, steady but just enough to be painful. She followed it, reluctantly pushing herself back up onto her arms. She squirmed as her arms trembled from Denji fucking her, until she managed to at least rest her elbows on the arm of the couch.

Denji’s hips slapped against Power’s ass, his dick and her cunt making horribly lewd sounds as his length slid through her walls and rammed into the barrier in the depths of her stomach, and sent trembling pulses of heat through her again and again.

The tension in her groin was back. It was so tight, so hot…

Power unraveled beneath Denji a second time. He kept his rhythm through every pulse, only readjusting to lean over Power and hold her close with one arm, the hand cupping a breast. Her back was to his chest, and he panted and moaned right in her ear.

“Denji,” Power managed between thrusts. “I’ve wanted to feel you like this since you first touched my chest…”

“You feel so good,” was all he could answer.

Power felt the coils of heat in Denji first, but soon, very suddenly, she came again, and her face fell to the couch cushions again. Denji thrusted into her hard, then slowed, then thrust again, in time with the waves of her orgasm, then as Power squeezed around him she felt a burst of liquid heat deep inside her abdomen, and Denji moaned loudly into her neck. Her orgasm synchronized with his, and she felt her body spasm, pumping Denji’s cock for everything it had. Her stomach felt like molten metal. And everything else felt like gelatin.

Power and Denji melted into the couch. They laid there together, Power enjoying Denji’s weight and his arms around her stomach and the sleepy, post-orgasmic haze they shared. Thick, hot cum— both Denji’s and Power’s— dripped out of her hole and over her clit, drawing out her first round of aftershocks.

After a moment, Power pushed Denji up and turned on her side, gasping as he slipped out of her and cum poured from her hole. Once she recovered, she held his face in her hands. He looked at her, in a way, the same as he always had, a little cocky, a little warm, a little protective. And she kissed him again, gently this time.

After a long moment, Denji nuzzled his head against Power’s. “Thank you, Powy.”

Power smirked. “Heh. Good boy, Denji.”

Denji growled in protest, but made no further comment.

After a moment, Denji sat up and stretched. “Shit, we should probably clean that up,” he said, pointing to the wetness on the couch by Power’s ass. His eyes went wide. “Wait, fuck! I came inside of you!”

Power raised an eyebrow and smirked in amusement as Denji began panicking, rambling about pregnancy tests and morning after pills.

“Denji, I’m a fiend, not a human girl,” Power smirked. “It’s fine.”

“Oh. Are you sure?”

“Of course I’m sure!” Power pouted. “I asked my doctor!”

“You have a doctor?” Denji said, raising an eyebrow.

The door slammed open, and Aki walked in carrying a collection of grocery bags on each arm, absentmindedly checking his keys.

“Who needs a doctor?” Aki asked, setting the groceries on the counter. It was only then, after a double take, that he noticed the state of his roommates. “Why are you two naked?”

“Ah shit…” Denji sighed.

Power stood up and raised her arms high in celebration. “Aki! Make us dinner!”

 

END

Notes:

I love these two’s chemistry. They were really fun to write. Thanks for reading!