Thank you everyone who commented / favorited / kudos! I really appreciate all your support. This is the last chapter of my two part angst week fic. Hopefully you like it. It's basically all smut. Hehe. (Warning: major lemon ahead, turn back now if it isn't your thing)

Also, big thank you to EmeraldWaves for beta-ing. :)

Standard disclaimer applies, storyline is mine but the Boku no Hero cast is Horikoshi-sensei's.

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"Yukimitsu-san," Shouto looked over his shoulder at the creation hero as he locked the hotel door with a soft click.

Momo was standing a few paces away at a small desk, her fingers skimming over the cover of the book he had given her. Her eyes hooded as she traced the gold lettering. "I don't know if I told you this the last time we were together, but some scientists have asked for me to help them study string theory," she said, looking up at him, a soft smile pulling at the corner of her lips.

Shouto's breathe hitched.

In the dim lighting of the room her gaze almost seemed ethereal as her dark orbs reflected the yellow hues of the hotel lamp like bright stars in the dead of night. The red string fluttered around his small finger as pride and a deeper feeling constricted his heart.

"With creation, astrophysicists want to see if I can help them test whether the ten dimensions actually exist," she mused with a soft giggle. Her hand coming up to cover her mouth as she watched Shouto turn from the door and walk over to the desk.

"It doesn't matter how many worlds there are out there, I'll always find you," he muttered, swinging his bag off of his shoulder and laying it down on the table next to her things.

A light blush crept over the creation hero's cheeks and her eyes skated to the floor in embarrassment. "Mou! That's probably not even how it works!" she pouted.

A small smile wanted to pull at the corner of Shouto's lips at her antics, but instead he let the truth of his words hang in the air as he stepped closer to her. "You're thinking too much," he whispered, wrapping an arm around her waist, his other hand tilting her chin up.

A pregnant pause lingered between them as his mouth lowered to float over hers, in the heady way he had done earlier that night. Then, with a small, knowing smirk, he brought his lips down to crash against hers in a searing kiss.

His lips were rough as he pulled Momo into him and the creation hero arched her back at the feeling of her body flush against his.

He was good, oh so good, was the only thought lacing through her mind as she felt him silently discard their coats onto the floor before breaking the kiss.

Momo bit her bottom lip to stifle a gasp as his hands were suddenly sliding under her shirt and pulling the garment up. His fingers brushing against the smooth expanse of her stomach sent electric sparks up her spine as the material was dragged up and over her head.

His lips swiftly found hers again as his large hands circled her hips to cup her round bottom. A small moan worked its way up her throat as Shouto gave her a rough squeeze but as soon as she opened her mouth his tongue pushed past her lips as he greedily devoured her.

Momo's body was tingling. Fire racing along her nerves as Shouto deepened the kiss and turned them around, pushing her up against the wall. Her breasts pillowed against his chest as he pinned her down with his weight.

Her body was melting. Her breasts getting heavy with need, Momo couldn't hold back from uttering another small whimper as her body moved against him, instinctually asking for more. Shouto smiled into her lips, his hands giving her bottom another squeeze as he rolled his hips into her. His leg pushing between her thighs so she could feel his clothed member hardening against her core. Momo whimpered again into Shouto's mouth at the evidence of his arousal.

She wanted him.

The thought fueled the burning desire within the heterochromatic man. And Shouto rolled his hips into Momo's aching core again as he deepened the kiss. Taking what he wanted, what he had to have, as passion and lust flared between them.

Momo was gasping. Fingers digging into Shouto's red and white hair as she fought between pushing the heterochromatic man away and pulling him closer.

When finally, she was dizzy and panting for air, Shouto turned his attention to her throat. Pressing slow, open mouthed kisses down her neck. Momo gasped and withered against him in delight as he nipped at the bruise on her throat.

"You'll only think of me," he whispered into her jugular, as he nipped at the soft flesh again. One of his large hands moving from her chin to mold her breast through her bra, before snaking behind her to unbuckle the garment.

The fabric slid easily off Momo's shoulders, skimming against her over sensitive nipples as it dropped to the floor.

Shouto pulled back slightly. His eyes moving slowly over her flushed form and he felt a smug satisfaction as he watched Momo's erratic breathing and the red blush staining her cheeks. She couldn't see the red string wrapped around their small fingers but she felt the attraction. The overwhelming desire to touch and be touched by the person they should never have wanted.

His eyes moved lower to land on her breasts. Her chest was still fluttering as she attempted to catch her breath. Her nipples hard from her own arousal. With a small groan, Shouto leaned down and gently pulled one of the buds into his mouth, skillfully swirling his tongue around one of the sensitive nubs. Momo's head fell back and a deep throaty moan bubbled up her throat as his teeth skimmed over one of her nipples.

She was heating up. Heat curling in her core begging for release as he gently sucked on her teat before releasing it with a soft smack. His other hand messaging the flesh of her other breast as he kissed between her globes to gently pull the other nipple into his mouth.

Momo couldn't contain herself as she withered against Shouto's weight. Just his mouth on her was driving her crazy and she wiggled her body to try and release some of the burning pressure overflowing from her core. Her sex unconsciously pushed against his hard member that was straining against the red and white haired man's pants.

Shouto nipped at the underside of the creation hero's breast. "You're so impatient," he whispered before returning to take her nipple into his mouth again, sucking and swirling his tongue around the hard nub. Momo's head fell back and she whimpered, but the dual colored eyed man ignored her as he continued to lavish her body.

She didn't know how much more she could take as her back arched off the wall and wetness started to pool in her underwear.

She needed more, "Yukimitsu-san, please." She begged dragging her nails through his red and white hair as he nipped at her collarbone.

"It's Shouto." He growled as he moved up to lick her jugular, grinding her clothed sex into his hard bulge.

"Shouto-san, please, I need you," she whimpered.

Her request must have pleased him as Shouto stepped back and discarded his shirt. Moving closer again, he leaned down and hoisted her up. Her legs instinctually wrapping around his waist as he carried her over to the bed and laid her down, quickly covering her body with his own.

"I want you. I want all of you, Momo," he breathed, leaning down and giving her a small, gentle kiss.

His body was tingling. He could already feel pre-cum beginning to wet his boxers and Shouto bit back a grunt as a delicate hand reached down between them wanting to release him from the constricting material.

Growling Shouto caught her wrist in a vice like grip. "No. Tonight it's only about you," he muttered, his eyes blazing as he laced their fingers together.

Momo whimpered softly at the dark undertones lacing through the heterochromatic man's voice but silently nodded her consent.

At her silent acceptance, he released her hand and leaned down in a demanding kiss that left stars in Momo's eyes as his other hand slide between her breasts, twisting one of her nipples, before moving lower to her pants. With skilled fingers he unbuttoned the top of her jeans. Sitting back, he helped her slide the restrictive material and underwear down and off her long legs in one go.

She was bare to him then. Her body aching as his eyes stared down at her, heat licking along her skin as his gaze lingered on her sex. Momo could feel herself blush as the feeling of moisture dripped from her core. Shouto must have seen it too as he was leaning over her then, one finger slipping between her thighs to glide up her slick lower lips. A low moan lodged itself in her throat as Momo closed her eyes at the feeling of light pressure pushing against her core. Her juices coating his finger in need.

She wanted more, and her hips bucked into his finger to try and release some of the mounting pressure he was creating.

'She's so wet.'

Shouto's dick throbbed painfully, yearning to be buried inside her. And he inhaled as he watched, transfixed as her juices ran down his finger as he gently pressed a second digit to her core. She wiggled again and Shouto couldn't stop a small smile from pulling at the corner of his lips as he slipped his fingers inside her wet cave.

Her insides immediately clamped down greedily on his digits as Momo's head fell back with a low, lustful moan.

Shouto paused for a moment to allow her to adjust before beginning to pump in and out of her in slow strokes. His other hand, trailing along her chest, rolled one of her nipples between his fingertips.

With a silent exhale he let his fire quirk activate as he slid his hand further down over the perfect globes to draw circles on her stomach. Momo let out a small whimper as the fingers inside of her curled in tandem and her eyes fluttered open to gaze lustfully at her partner. "Shouto."

His only reply was a small smile before Shouto leaned down to take her tit back into his skilled mouth as he curled his fingers inside of her again. Momo's body shook. Her core twisting at each pump of his skilled fingers, begging for something only he could give her. "Shouto," she begged again as her body began to buck beneath him. Her back arched at the familiar feeling of her walls twitching.

She was close.

Shouto curled his fingers inside of her one more time bringing the creation hero over the edge as her insides pulsed and fluttered around him. Her eyes closed in bliss as her head fell back and a low keening noise slipped past her lips. Shouto allowed his own eyes to close for a moment, as he felt the soft flutters of her walls wrap around his fingers before pulling them out.

Momo whined as he extracted himself. Her eyes fluttering open to see the wet strings of her arousal clinging to his fingers. A deep blush ran across her face at the sight and Momo turned her head away in embarrassment.

Shouto chuckled. "You're too cute," he smirked, wiping his fingers against the sheet covers and leaning back over her to kiss Momo's red cheek before pulling back and standing up.

"It's embarrassing," she mumbled, as she watched Shouto grab a small square packet from his bag and discard his clothes.

Shouto shook his head. "No it's not. You're beautiful," he said, coming back to rest above her and kissing her softly on the lips.

His member was throbbing painfully as it brushed against her stomach, pre-cum leaking from the tip. And Shouto bit back a curse as he leaned back on his hunches and gave himself one pump to ease the painful tension swelling in his cock. He needed her.

Taking the packet between his teeth Shouto went to tear the condom out when a delicate hand wrapped around his arm.

"No," she breathed, a deep flush spreading all the way up from her neck. "Please, tonight, I want to feel all of you," she whispered.

Shouto stared at the deep blush staining across Momo's cheeks, taking in her dark eyes that although embarrassed, shimmered with determination and emotions he didn't want to name. A smile pulled at his lips. "As you wish," he breathed, pulling Momo's hips closer, letting the condom fall onto the bed.

Sliding between her folds, Shouto grunted as he saturated his length in her dampness before guiding himself to her opening. Momo moaned at the feel of him pushing into her. Her insides stretching to accommodate him as he penetrated her.

Shouto's groan mixed with Momo's moan was like a song as his cock pushed deeper into her. It was so good. So incredibly good. He didn't know if he could ever use a condom again after this. Her sex was so wet and so tight. It was almost mind numbing as it gripped around his cock and Shouto had to pause to catch his breath, otherwise he was sure he would come within seconds.

Closing his eyes, Shouto concentrated on regaining his control. When he felt her wet cunt squeeze experimentally around his girth Shouto couldn't help gasping as she moved against him, impatient to feel her lover fill her up. Shouto ground his teeth as he pushed into her in warning before he began to thrust in and out of the onyx eyed woman in a slow strokes that gradually grew faster as he slid in and out of her tight, wet sex.

She was so warm and so tight, Shouto thought as her insides milked his member. Her sweet moans encouraging him to move faster as her fingers ghosted down his back and dug into his hair. Her breath coming in short gasps and moans as he forced himself deeper, touching her womb.

"Shou - Ahh!" Momo gasped as her inner walls suddenly tensed around Shouto's shaft as he surged down into her again and again.

And with a high pitched keen, Momo's walls finally tightened around Shouto's cock. Her back arching off the bed as her body convulsed and her mind went blank as her orgasm crashed over her. Shouto quickened his pace as he continued through each narrowing of her walls as his cock began to ache and swell with his own release curling in his loins.

With a few final, short thrusts Shouto spilled himself into her. Rocking his hips into her supple body as he allowed his seed to seep deep into her womb. Groaning through his teeth Shouto slowly pulled out and watched entranced as his cum leaked out of her and dripped onto the sheets below them.

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Warmth tightened in Shouto's chest as he sat on the edge of the bed and looked down on the sleeping woman. Her breath was coming in slow, even puffs as the warm after effects of sex seeped into her muscles and pushed her into a deep sleep.

Long strands of obsidian hair had fallen over her check. And leaning over, Shouto carefully, flicked the strands of hair behind her ear to reveal her porcelain skin and rosy lips.

She was so beautiful.

His heart tightened. He wanted to kiss her again, but that might wake her. With a soft sigh, Shouto sat back.

The red string around his pinky pulsed. And his gaze slid away from the obsidian haired woman to watch the small, delicate string that connected them curl through the room like a delicate spider web.

Shouto exhaled, racking a hand through his hair as he leaned over. His elbows resting on his knees as he pushed his hands through his red and white strands.

Perhaps, if things were different, he thought with a pain tightening around his heart like wire. Perhaps if Touya had left him with that shitty old man, or if he hadn't gotten in with the League.

The heterochromatic man looked back down at the red string tied tight around his pinky. Perhaps if string theory was true, there would be a world in which he would have chosen a different path. Perhaps in that world he could have stayed... perhaps he could have loved her...

Shouto sighed as he pushed himself off the edge of the bed and collected his discarded clothes.

His heart ached as he slipped on his pants and the string around his finger grew painfully taut. Shouto paused as he buttoned his jeans. What would happen if he were to stay? Here. With her. He could wake her up with soft kisses and please her how he had earlier -

Shouto quietly exhaled as he felt himself harden in response to the memory. It was no use. They lived in two different worlds.

Quietly slipping on his shirt, he padded quietly to the door.

Because of his dual quirks, Shouto was immune to changes in temperature. Scalding hot water felt like a lukewarm bath and frosty winds like a midsummer breeze, but as he stood at the door, his hand on the handle he felt frozen. His insides so cold they burned as the desire to turn back around called to him like a siren song. Squeezing his eyes shut for a moment, Shouto curled his hand around the door handle.

Opening his eyes slowly, Shouto's lips thinned in determination and he turned the doorknob.

"See you around," he whispered, one last time, letting the door close behind him with a soft click. Cutting out the only woman he had ever felt for as he walked out.

Shouto paused outside the automatic doors of the hotel.

The red string around his pinky tugged again painfully, trying to lead him back inside but it was too late. They lived in different worlds. Light and dark. Good and evil. Taking a deep breath of the cool night air, Shouto pulled out his cellphone. Hitting speed dial as he continued out into the night.

"Hey," he spoke softly into the phone. "It's me," he said, pausing to look up at the full moon sitting in the clear night sky. "Where should I met you, Dabi?"

Unbeknownst to him, two onyx eyes slid open as the door clicked shut.

Two salty tears trailed down porcelain cheeks as Momo curled into a ball and willed herself not to cry.

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"Todoroki-kun?"

A sixteen year old boy blinked lazily. Rubbing at his eyes with the back of his hand, he looked to his green haired friend sitting across the lunch table. Midoriya Izuku's green eyebrows had dipped down slightly in a worried frown.

"Is everything okay?" The green haired boy asked, concern lacing his voice, "You had a strange expression just now…"

Shouto exhaled slowly, letting his eyes drop to his bowl of untouched soba in front of him as he tried to recall what he had been thinking about. "A strange expression, huh?"

"Yes! You looked like something was bothering you." Iida exclaimed as he chopped his hand in the air comically.

Shouto made a nondescript noise in the back of his throat. His gaze lifting to look back at Midoriya before his heterochromatic eyes slid past his green haired friend's shoulder to land on a girl with jet black hair pulled up into a high ponytail. "Yeah…I'm okay" he whispered, his mouth suddenly feeling dry as the red string wrapped snugly around his pinky finger tugged lightly as he watched the vice president of 1-A sit down at the opposite table.

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Thank you everyone who read, hopefully you like the bittersweet ending. :)