Insatiable

Disclaimer: I do not own My Hero Academia.

Pairings: Shinsou x Todoroki, Shinsou x Midoriya, Midoriya x Todoroki, Midoriya x Bakugou, Bakugou x Shinsou, Bakugou x Todoroki, Shinsou x Todoroki x Midoriya, Bakugou

Plot: Midoriya assists with a sparring match between his partners.


Power Exchange

Shinsou x Bakugou x Todoroki x Midoriya

Midoriya stood back while watching the match playing out before him, his quirk shining brightly in his viridian irises, his Sight allowing him to see each of his partners moves before they themselves had made their final decisions on which counterattack to launch next. The endless possibilities of their smallest decisions branched out before him like the great boughs of interwoven trees, the highlighted routes woven across the skies illuminated brilliantly like incandescent starlight, framed in various shades of living, breathing green. Each time they chose a path, certain branches darkened while others became brighter than before, and as they continued their sparring match Midoriya frowned a little, taking a step closer, Todoroki glancing towards him and watching him carefully before redirecting his attention to Bakugou and Shinsou.

"Hitoshi. Don't put Katsu in a headlock right now. He's too fired up to submit to you, it'll end up hurting you both."

The purple-haired hero glanced towards his husband briefly, calling out gruffly, "Alright, Izuku. I'll find another way to gain the upper hand."

"Like hell you will!" Bakugou barked out, his eyes flashing dangerously as he reared back and unleashed another explosion, Todoroki quickly throwing up a wall of ice between them, sheltering Midoriya from the two heroes as they continued their match, leaving craters across the ground in their wake.

Shinsou lashed out and wrapped Bakugou's ankle in binding cloth, tripping him and throwing him quickly into the air, the blonde hero barking out a series of cheery laughter before kicking free and firing off a series of blasts from both of his palms, showering explosions down upon the hero left and right, not relenting until he was certain he'd subdued the older hero, panting lightly with effort as he landed amidst the rubble, waiting for the dust to clear.

Midoriya watched them quietly, his Sight still churning in his irises, Todoroki glancing towards his boyfriend briefly before focusing on the opposing heroes once again.

As soon as the dust settled enough for Shinsou to make eye contact, he lashed out with his binding cloth again, wrapping one length around Bakugou's neck and the other across his forehead, prying open his eyes, his voice booming as he commanded, "Kneel, Katsuki."

The blonde gasped and twitched violently as he fought against the command, the older hero stepping closer carefully, Bakugou growling and flailing in his hold, his red eyes burning as he fought against the command searing through him like wildfire.

"Kneel." Shinsou commanded again, strengthening the hold of his quirk, a distinctive sheen casting a haze over Bakugou's bright eyes as his legs started to weaken, and he inhaled shakily as he was forced to his knees, violet light twisting in his vermillion irises. Shinsou approached him warily, reaching out and loosening the binding cloth wrapped around Bakugou's throat, petting his jaw and cheek gently, whispering gently just over the sounds of small explosions igniting against Bakugou's fingertips, "Good boy, Katsuki. Good boy, sweetheart. Easy."

Bakugou blushed furiously, his breath hitching as Shinsou went down on one knee before him, tilting up his face and kissing him slowly, Bakugou relenting and allowing the other hero to overwhelm his mind completely, kissing him back gently, a soft whine caught in the back of this throat.

Shinsou chuckled softly, smiling against his lips and slowly withdrawing his quirk, searching Bakugou's eyes as they cleared, petting his cheek gently. "That's four to three. You're buying dinner tonight, Katsuki."

"Bastard." Bakugou hissed out quietly, Shinsou chuckling affectionately as the blonde pressed up for another kiss, Todoroki sighing softly in relief and stepping closer as well, Shinsou glancing up at him and rising to his feet, helping up Bakugou as well.

Midoriya watched over them for a moment longer, and then gradually he let out a slow, deep breath. He blinked a few times, waiting for his quirk to fall dormant once again, then he stepped over to his partners and allowed them to wrap him in their strong embrace, Bakugou kissing his temple while Shinsou tilted his face up for a kiss, Todoroki petting over his back and holding his waist, Midoriya closing his eyes and relaxing between them.

"Before dinner," Shinsou whispered gently, catching Midoriya's eyes, "I was thinking about visiting the hot springs we passed earlier. Soaking for a while after sparring would be good for all of us." He looked to Todoroki, carding his fingers through the hero's long bangs affectionately before trailing his fingers down his nape, tugging gently at his two-toned braid. "What do you think, Shouto?"

"I'd love to soak for a while. I'm sore as well." He sighed pleasantly as Shinsou leaned closer to claim a kiss, Bakugou watching them with a soft, affectionate expression, sweat and dirt marring his nose and cheeks.

"Bathing before dinner works for me." He agreed gruffly, Midoriya leaning against his side and resting his cheek against Bakugou's shoulder, humming softly and reaching out to pet along Todoroki's side.

"I know the way. Let's go before it gets too dark to walk down the mountain without a hassle." He offered Bakugou a kiss before pulling away, stepping across the barren mountaintop and skirting around a series of deep craters before entering the woods, Bakugou lingering for a moment longer before trailing after him, Shinsou and Todoroki following quietly behind.

They descended the mountain in relative silence, listening to the sounds of the forest and following the footpath woven into the dense grass before finding what they were searching for, Midoriya stepping closer to the tiered series of rocks and dipping down to trace his fingertips across the steaming water. He looked up over his shoulder towards Bakugou as the blonde hero came to stand at his side, already beginning to strip off his armor with a deep sigh, Midoriya rising to assist him, his green eyes tracing across his toned chest and abs appreciatively, Bakugou catching his waist in his hand and tugging him closer, kissing his lips gently.

"Thank you, for warning Hitoshi." Bakugou whispered gently, Midoriya humming and tugging him down for another kiss, tangling his fingers in Bakugou's cropped fade.

"Of course, sweetheart. I know how being trapped like that can get to you sometimes. Especially in the heat of battle." He searched Bakugou's vibrant eyes, holding his gaze for a moment longer before arching against his chest, whispering heatedly, "You're still worked up from sparring, aren't you? I can feel the energy trapped inside of you, resting just barely beneath the surface." He blushed faintly, biting his bottom lip, coaxing his boyfriend down for another kiss, Bakugou growling softly and lifting Midoriya against him, holding him tightly for a few moments before letting him go.

"I want to fuck you." Bakugou whispered, and Midoriya hummed his approval, nodding as he glanced towards Shinsou and Todoroki standing together nearby. His partners were laughing and teasing one another gently with soft kisses as they undressed, Midoriya shivering lightly as Bakugou kissed down his throat, coaxing him into arousal.

"Alright. Let me get undressed." Midoriya murmured before turning to capture Bakugou's lips, kissing him gently while the older boy helped him out of his clothes, parting just long enough to strip his shirt off overhead before Bakugou was kissing him once more. He kicked free his leggings and stepped into the shallow water, tugging Bakugou along with him as he waded into the shallow pool, coaxing him into the water and reaching up to wrap his arms around Bakugou's neck, arching against him and panting softly against his tongue.

Bakugou growled and turned Midoriya away from him suddenly, gripping his hips and kissing at his shoulder, Midoriya whining and planting his palms against the warm stone just beneath the water, arching back against Bakugou's touch as he slipped his fingers between Midoriya's cheeks. He grinned against Midoriya's ear as he found the silicone plug nestled there, teasing around the edges of it gently and twisting it for a moment before pulling it free, lube spilling into the water and immediately slicking Midoriya's flushed skin, the older boy groaning appreciatively and pressing closer, slipping his cockhead between Midoriya's cheeks.

"Such a good boy for me, aren't you Izuku? Already open and ready for me to fuck you." He panted softly against Midoriya's ear, quickly pressing inside, Midoriya gasping and crying out eagerly as he was filled to the hilt, his cock twitching as precum trickled down his shaft, dripping onto the surface of the hot water. "Fuck you feel so good, baby. You're already clenching so tightly around my cock…"

Shinsou hummed appreciatively at the sight as he waded into the water beside them, tugging Todoroki closer and kissing his neck slowly, content to watch his partners while relaxing into the hot water. Todoroki watched them as well, biting his lip and exhaling shakily while Shinsou kissed at his pulse, Todoroki reaching between Shinsou's legs and wrapping his fingers around his cock gently, already starting to stroke along his thick shaft in time with Bakugou's thrusts.

Bakugou angled Midoriya's hips slightly, finding his prostate easily and prodding against it, the smaller boy crying out eagerly as he was thoroughly fucked. He slipped a little against the wet stone, falling forward into the shallow water and coughing slightly as his face was splashed, Bakugou growling and quickening his pace, waiting for Midoriya to catch his breath before dunking his head under the water.

Midoriya clenched down around Bakugou tightly, the blonde chuckling and holding his head under for a few moments longer while fucking against his prostate, allowing him to rise and catch his breath only for a moment before dunking him under again. Shinsou watched over them carefully, ensuring Bakugou wasn't being too rough with Midoriya while they played, the freckled boy crying out for more eagerly as Bakugou leaned closer and kissed at his steaming shoulders, Midoriya panting heavily and gasping in greedy lungfuls of air, his breath hitching as Bakugou bit into his shoulder before dunking him underwater again.

Midoriya climaxed while his head was underwater, tightening around Bakugou and releasing in quick bursts beneath the hot water, the blonde keeping him under for several moments longer before letting up, Midoriya coughing roughly and quivering as he fought to keep his head above water once he was able to rise. Bakugou wrapped his arm around his chest immediately, lifting Midoriya upright so he could easily breathe, bucking into him quickly as he found his own release, groaning desperately against his ear while canting his hips forward nice and deep. "Fuck, baby. That was so fucking good…"

Midoriya didn't reply, merely panting and trembling as he rested his head back against Bakugou's shoulder, his face entirely flushed, Bakugou withdrawing from him slowly and turning Midoriya around to face him, petting over his steaming cheeks gently, noticing the distinctive haze across his eyes.

Shinsou noticed it as well, humming quietly and reaching out for Bakugou, the blonde guiding Midoriya closer to Shinsou so the older boy could tug his husband into his lap, kissing Midoriya's shoulder gently while whispering soft praises and reassurances, the smaller boy curling up against his chest and relaxing into his afterglow.

Bakugou watched Midoriya carefully, admitting after a moment, "Izuku's never fallen into subspace like that with me before, not so quickly…"

Shinsou glanced up and met Bakugou's eyes, giving him a soft smile and holding out his hand, Bakugou offering him the silicone plug he had been holding, Shinsou guiding it between Midoriya's cheeks and pressing it back inside, the silicone plug easily sliding back into place. "It's alright. You don't have to worry. You did everything right, making sure he could breathe, holding him under as he came. You gave him exactly what he wanted, what he needed to be sent quickly under." He smiled and nuzzled against Midoriya's forehead gently, adding as he met Bakugou's eyes. "It means he's starting to trust you not only as his boyfriend, but as his Dom. If you continue to pursue things like this with Izuku, he'll start to submit to you the way he does with me. He's a service sub, and he likes following his partners' commands by giving them what they want from him, unconditionally. He trusts you with his life, Katsuki."

Bakugou blushed, nodding slowly, reaching out and carding his fingers through Midoriya's wet hair. "Yeah, yeah I know he does. It's amazing, knowing he trusts me enough to submit to me like that. I feel...privileged, knowing he believes in me. Knowing he's eager and willing to surrender to me completely, without me even having to ask."

Todoroki sighed softly, reaching out and petting over Midoriya's back, his cheeks flushed a pretty shade of pink. "Watching you two together like that, it makes me feel…" He bit his lip, glancing up and meeting Bakugou's eyes. "I wonder what it would be like to see you like that, Katsuki. Completely immersed in subspace." He let out a trembling breath, adding heatedly, "I want to watch Hitoshi with you while you're being submissive. I want to watch him take you apart."

Bakugou inhaled sharply at the suggestion, holding Todoroki's eyes for a moment before glancing up at Shinsou, clarifying hesitantly, "You mean, without Hitoshi using his quirk?"

Todoroki hummed a soft affirmative, blushing all the while, exhaling softly and glancing up towards Shinsou as well, the older hero smiling to himself and watching Bakugou carefully.

"Do you want me to fuck you, Katsu?" Shinsou asked, his voice low and deep. "Do you want me to dominate you, just like you did with Izuku?"

"Yes." Bakugou breathed, and it surprised him how easily the answer came, Shinsou chuckling softly and shifting Midoriya from his lap gently, offering him to Todoroki, the two-toned hero wrapping his arms tightly around his boyfriend and rubbing along his back gently, kissing his brow.

Bakugou shivered as the older hero approached, Shinsou reaching out to him and wrapping his arm around Bakugou's waist, petting over the dip of his lower back and kneading the rise of his ass, searching his eyes and whispering gently, "I wasn't too rough with you before? When I forced you to kneel?"

Bakugou's expression softened at that, and he hummed lightly and shook his head, leaning against Shinsou's chest and nuzzling at his shoulder. "No, I'm alright. If anything, it just worked me up more. In a good way."

Shinsou smiled against his temple, kissing across Bakugou's face gently while tilting up his chin, searching his eyes and kissing him slowly, Bakugou shivering pleasantly and relaxing fully, allowing Shinsou to take the lead. He guided Bakugou backwards, pressing the blonde back against the shallow dip of the rocks so he was sitting where Midoriya had been dunked before, Bakugou's breath hitching as Shinsou tilted him backwards and pressed him into the hot water, holding Bakugou's eyes all the while.

"Breathe." Shinsou whispered, and Bakugou did as he was told, taking a deep breath and holding Shinsou's eyes, exhaling shakily and holding onto his wrist tightly. "Good boy. You can trust me. I'm not going to let anything happen to you, Katsuki. I would never let anything harm you. Breathe."

Bakugou took another deep breath, searching Shinsou's eyes, feeling heat prickling up the back of his spine that had nothing to do with the hot springs surrounding them. Shinsou watched him with a tender expression, dunking him back slowly, submerging everything but his face, waiting for Bakugou to take another breath before pushing him under, holding his gaze, watching the small trail of bubbles slowly rising to the surface as Bakugou held his breath.

He didn't keep him under for long, allowing Bakugou to rise and take a breath, praising him gently and petting across his cheek, steadying his grip before pushing him under again, Bakugou exhaling beneath the water, the rush of bubbles greeting the surface blurring Shinsou's face above the water. The other hero pulled him up again, allowing him to breathe, holding Bakugou's eyes and whispering gently, "Alright, Katsuki. We're going to do it just like that when I'm inside you. I want you to hold onto my wrist tightly, and if you're running out of breath and starting to panic, I want you to let go."

Bakugou nodded hesitantly, shivering as Shinsou drew closer and pressed between his thighs, gasping out a heated moan at the sensation of large, warm fingers wrapping around his arousal, stroking him slowly, coaxing him into desire while petting gently over his throat.

He wasn't sure what he was feeling exactly, but the longer Shinsou teased him and slowly tightened his grip on his throat, the more light-headed and hazy Bakugou became. When Shinsou prodded between his cheeks and began pressing inside, Bakugou's breath hitched at the stretch and he whined while rocking his hips lightly, hissing and clenching his eyes tightly shut. It hurt deliciously, and he moaned out as his breath hitched, Shinsou slowly working his way inside. Bakugou liked it best like this, taking Shinsou unprepped and raw. He wanted to feel every inch of the other boy as he pressed inside of him. He wanted the sensation of Shinsou's cock roughly splitting him apart.

It did something to him, knowing Shinsou was more powerful than him. Knowing despite the differences in their unique abilities, the other boy didn't even need to use his quirk for Bakugou to submit. It ignited a fire inside of him, his pulse twitching in his cock as Shinsou canted his hips slowly and his precum started to slick their movements, his grip on Bakugou's throat tightening as he pushed him underwater, Bakugou exhaling a rush of bubbles and holding onto Shinsou's wrist tightly, his heartbeat fluttering wildly in his chest.

He closed his eyes against the sting of the hot water, continuing to exhale until there was nothing left to expel, blinking up at Shinsou through the clear water and searching his eyes, the older boy bucking into him slowly, keeping him under for a few seconds longer before loosening his grip and guiding Bakugou to the surface. He inhaled deeply as he broke the surface of the water, the sudden rush of oxygen searing through his lungs and almost choking him, coughing lightly at the sensation of water trapped in his nose, tossing his wet hair from his eyes and coughing again as Shinsou continued fucking him slowly, reaching up to pet his flushed cheek, smiling down at Bakugou gently.

"Again, Katsuki. I'm putting you under."

Bakugou let out a shaky exhale and nodded, taking a few deep breaths to prepare himself before Shinsou pushed him back again, a high whine trapped in the back of his throat as Shinsou angled his hips and started bullying his prostate, the younger hero exhaling and choking lightly, loosening his grip on Shinsou's wrist, his boyfriend pulling him to the surface quickly to allow him to breathe. Bakugou coughed and sputtered, gasping and crying out eagerly as Shinsou continued to fuck into him quickly, wet slaps sounding between them as water splashed over the sides of the natural basin, Shinsou grinning and praising him gently while holding Bakugou's eyes.

"That's my good boy, you're being so good for me, Katsuki. Take a deep breath, sweetheart. Just look at me. Think only of me."

Bakugou whined and relaxed beneath Shinsou's touch, taking a breath and watching his vibrant purple eyes as he was pushed beneath the water once more, Shinsou quickening his pace and bucking directly against his prostate, Bakugou's cock twitching against his navel and leaking precum into the hot water as he clenched tightly around Shinsou's throbbing cock.

His voice was muted while Bakugou was beneath the water, but he could tell Shinsou was speaking to him still, praising him, Bakugou still clinging to his wrist tightly. "Good boy, Katsu. That's my good boy. I'm so proud of you, you're being so brave." He pulled Bakugou to the surface, allowing him to breathe, leaning down and kissing his lips gently while Bakugou panted shakily against him. "I love you so much, Katsu. You're my good boy, aren't you? My sweet, precious boy…"

The sound of Midoriya's soft gasps greeted his ears, and Bakugou's breath hitched as he realized Midoriya was writhing against Todoroki's lap, the two-toned hero whispering to him softly and bucking his hips, Midoriya clinging to his shoulders and bouncing in his lap, panting shakily as he kissed Todoroki back eagerly. Shinsou chuckled and watched Bakugou's expressions, leaning down to kiss him again, humming against his lips and pulling back just as he dunked him underwater, Bakugou exhaling and letting out a deep moan, Shinsou's cockhead prodding against his prostate over and over again.

Time started to slip, and the rhythmic rise and fall of his breathing faded in and out of the all-encompassing lull of the steamy water surrounding him, Shinsou ensuring he was breathing easily before dunking him under again. He began pushing Bakugou to the edge his limits carefully, keeping him submerged for a little longer each time, until eventually he was fucking into Bakugou roughly while keeping him fully underwater, Bakugou's grip loosening only slightly when he was ready for Shinsou to allow him to surface again.

Eventually the older hero's hips snapped forward roughly and he came inside Bakugou in hot bursts, groaning out loudly as he rode out his high, Bakugou watching his face twisting from just beneath the surface of the water, trails of bubbles steadily rising from his nose and lips towards the surface.

Shinsou peered down at him through the water, panting unevenly and chuckling deeply while holding Bakugou's gaze, searching his eyes and whispering gently, "I love you, Katsuki."

Bakugou loosened his grip on Shinsou's wrist, and the other boy drew him to the surface quickly, Bakugou coughing roughly and sputtering for air, Shinsou drawing him up completely and holding Bakugou against his chest, rubbing along his back soothingly. He was still painfully hard, Shinsou humming and kissing the shell of his ear while wrapping his fingers around his weeping cock and beginning to stroke lightly, Bakugou gasping and rocking his hips forward desperately as he clung to Shinsou's shoulders, his nails biting roughly into his sweat-slicked skin.

"Cum for me." Shinsou whispered, and his words lit Bakugou on fire, the blonde tightening up and clenching down around him as he spilled over Shinsou's hand, tucking his face against his boyfriend's neck and sobbing quietly, Shinsou whispering to him gently and coaxing him through it, petting over his trembling back in gentle passes.

He didn't quite remember Shinsou moving him, but when he came back to himself he was curled up against Shinsou's chest, resting in the steamy water at Todoroki's side, Midoriya humming softly and kissing Todoroki while petting over his chest, his partners whispering softly back and forth while Shinsou watched them, his hands trailing over Bakugou's waist tenderly.

"I love you." Midoriya whispered, searching Todoroki's eyes. Todoroki smiled and nodded, kissing him gently for a few moments before sighing pleasantly and pressing their foreheads together.

"I love you too, Izuku."

Shinsou leaned closer to kiss Todoroki's temple, the younger hero tilting up his face to accept a few soft kisses, Midoriya leaning closer to kiss Shinsou as well. Once he was satisfied, the freckled boy looked down at Bakugou and searched his eyes, petting his flushed cheeks and holding his hand against Bakugou's forehead, his expression soft and affectionate as he whispered gently, "You aren't overheating, are you Katsu? Are you comfortable like this?"

Bakugou blinked up at Midoriya, nodding gingerly, not having the strength to sit up fully and speak, instead turning his face into Shinsou's chest and murmuring against his skin, "Can stay like this...forever…"

Shinsou chuckled heartily and leaned down to nuzzle Bakugou's damp hair, petting along the curve of his spine before whispering gently, "We should get some food in us before we all start to crash. I know I said you had to pay for dinner, but I'll grab something tonight and let you pay next time." He carded his fingers through Bakugou's hair, tugging gently, Bakugou whining and tucking his face against Shinsou's neck, breathing deeply against his warm skin. "Good boy, Katsu. Good boy. I love you, sweetheart."

"Love you." Bakugou murmured, and Shinsou kissed his crown once more before returning his attention to Todoroki and Midoriya, allowing Bakugou to rest against his chest, Bakugou basking in his afterglow and subspace, Shinsou's gentle hand keeping him down in the calm and quiet.

He vaguely remembered getting dressed, and then Shinsou's strong shoulder against his cheek as he was carried down the mountain. He didn't recall much of the drive home, but he did remember curling up in bed beside Todoroki while Shinsou ordered food, Midoriya disappearing upstairs to check on Eri and the girls before returning to them, picking out a movie to watch as they shared their dinners.

Bakugou dozed off against Shinsou's chest as they curled up together on the couch, Midoriya pressed tightly between Todoroki and Shinsou on the opposite side, resting half in his boyfriend's lap and half pressed against his husband's side, several pillows and a thick blanket tucked around them. He reached over and pet through Bakugou's hair while they rested together, the blonde breathing deeply and allowing his partners to care for him, sleeping through the first movie and starting to slowly return to his senses as they started the second, blinking slowly and glancing towards the food nearby, Shinsou offering him bites of lo mein and chicken, Bakugou blushing lightly at the intimacy of being hand-fed.

Shinsou gave him soft kisses between bites, licking into his mouth and whispering to him gently, offering him another bite and waiting for him to chew and swallow before kissing him again. Bakugou clung to him lightly, Midoriya watching them with a soft smile, his expression affectionate beyond words, Todoroki chuckling softly and petting over Midoriya's side and hip, whispering against his shoulder, "I'm so happy, being with all of you like this. Watching the way our relationships continue to grow and develop with time, the power exchanges that fluctuate between us. It's a beautiful thing, seeing Katsuki soft and submissive like this. I never imagined years ago we would one day share a love like this."

Midoriya hummed his agreement, tilting up his face and kissing Todoroki's jaw, whispering gently, "I think about that all the time. I love each of you more every day. I never imagined I would be privileged enough to share my life with you. All of you." He returned his attention to Bakugou, watching as he kissed Shinsou slowly, resting his cheek against his husband's shoulder and watching them with a fluttering heart.

He loved them, each of them unique in their own ways, each precious and beautiful, entwined within his heart like bright rays of sunshine. He held Todoroki's hand tightly, petting over Bakugou's stomach lightly and tilting his face up to kiss Shinsou, his husband smiling against his lips.

He could only imagine what it would be like to spend the rest of his life with them.


Thanks for reading! More to come!