My Harem System In My Hero Academia

After the fireworks ended, Momo, Ochaco, and Yami returned to their rooms to sleep.

Yami, however, didn't need to sleep. He decided to train in his room; he ran through drills and stretches as the soft glow of the moonlight streamed through the window.

Just as he was about to wrap up for the night, there was a soft knock at his door. 

Yami paused, raising an eyebrow, then walked over to open it. Standing there was Ochaco, still dressed in her tiny pink micro bikini, her cheeks flushed a light pink.

"Hey," she said, her voice quiet, almost shy. She fiddled with the strap of her bikini top, not meeting his eyes. "I… couldn't sleep and thought maybe we could talk for a bit?"

Yami leaned against the doorframe, his golden eyes studying her for a moment. She looked nervous, but there was something else in her expression—curiosity, maybe even a little determination. 

"Sure," he said, stepping aside to let her in. "What's on your mind?"

Ochaco walked in, the soft shuffle of her bare feet on the wooden floor the only sound in the room. 

She glanced around nervously, hugging herself slightly. "I just… wanted to thank you," she began, her voice hesitant. "For inviting me here. It's been really nice… different from what I'm used to."

Yami smirked, sitting down on the edge of the bed. "It's no big deal," he said, patting the space beside him. "Come sit. We'll talk for as long as you want."

Ochaco hesitated for a moment, then nodded, her lips curling into a small, shy smile as she joined him.

"So, what's on your mind?" Yami asked. Ochaco hesitated for a moment, avoiding his gaze. "I… I wanted to talk about relationships," she finally said.

Yami raised an eyebrow, smirking slightly. "Alright. What about them?"

"Well…" Ochaco glanced up at him nervously. "You and Momo… are you two, like… together?"

Yami chuckled softly, leaning forward. "Yeah, we're in a relationship. But it's not what you'd call 'normal.' Momo knows I don't do exclusivity. I'm free to be with as many girls as I want, and she's fine with it."

Ochaco's eyes widened, and her expression was one of shock. "But… isn't that unfair to her? Doesn't it… bother her?"

Yami shrugged. "She understands who I am. She gets it; honestly, it's part of what makes us work so well together."

Ochaco's heart raced as she processed his words. A part of her felt uneasy, but another part couldn't deny the pull she felt toward him—the confidence, the way he looked at her and Momo. The temptation was overwhelming.

Her breath hitched as she met his gaze. "Yami," she said softly, her voice trembling. "Would you… want to have sex with me?"

Yami's eyes widened, his golden eyes gleaming. "You sure about that?"

Ochaco nodded slowly, her face burning with both embarrassment. "Yeah. I'm sure."

Yami ripped off Ochaco's micro-bikini, leaving her naked and trembling before him. 

His lips trailed along her neck, biting and sucking, while his hands grabbed her thick thighs, spreading her legs apart as she shivered under his touch. 

Her voice was shaky as she admitted, "I've never done this before…"

Yami smirked, his voice calm but full of control. "Don't worry. I'll make sure you love it. But you're gonna feel me, every inch."

He slid his fingers down to her wet pussy, teasing her lips and rubbing her clit. 

Ochaco's body reacted before her brain could catch up, her hips moving toward his hand as her moans got louder. When her juices coated his fingers, and she was grinding against him, Yami stood up and pulled off his shorts, his thick cock springing free, already rock-hard.

Ochaco froze when she saw it, her eyes widening in shock. "I-It's so big…" she whispered, her voice barely audible. 

When she leaned in closer, she hesitated, her face red as she sniffed him. The heavy scent made her head spin. Slowly, she pulled his shorts down the rest of the way, and his cock smacked her face, leaving a slick line of precum on her cheek.

Yami laughed softly, brushing her hair back as she stared at him in disbelief. "Don't just stare, Ochaco," he said, grabbing her by the waist and tossing her onto the bed like she weighed nothing. 

He flipped her onto her stomach, spreading her ass cheeks wide, watching them jiggle. "This thick ass is begging for me to stretch you out."

She let out a nervous whimper as Yami positioned himself behind her, the fat tip of his cock pressing against her entrance. 

He rubbed it up and down, coating himself in her juices. "Relax," he said firmly, gripping her hips. "Just breathe, Ochaco. I'll go slow."

He pushed in slowly, her tight pussy squeezing him like a vice. Ochaco cried out, gripping the sheets as she tried to handle his size. "It's… it's too much!" she gasped, her voice shaking.

"You'll take it," Yami growled, sliding deeper, inch by inch. Her ass jiggled, and her wet pussy sucked him in even as she moaned and squirmed. "Your body can handle it. You're dripping all over me."

When he was halfway in, Yami paused, leaning over her trembling body. "How are you holding up?" he asked, his hands roaming her body, squeezing her soft curves.

Ochaco was panting, her face red and her voice weak. "I… I've never felt so full… It's so big… but I'm okay…"

Yami smirked, gripping her ass tightly. "Ochaco, I'm only halfway in," he said, his deep voice sending chills down her spine. "You've got a lot more to take."

Her teary eyes widened as he pushed in further, her pussy stretching to fit him. When he finally bottomed out, Ochaco let out a broken moan, her body shaking. Drool dripped from her mouth as she mumbled nonsense, her mind blank from the overwhelming sensation.

"Are you okay, Ochaco?" Yami asked, his voice steady, though the smugness was obvious. He gave her ass a sharp slap, watching it jiggle.

Ochaco could barely speak, her words slurred. "I… I'm so full… It's too much… but it feels so good…"

As Yami relished the tight, warm grip of Ochaco's virgin pussy, the system chimed in.

[YES! Finally! You're railing that fat ass! About time, champ!]

Yami clenched his jaw at the interruption, but the words kept appearing before his eyes.

[You know what? I'll cut you a deal. You've been grinding hard—literally and figuratively. If you can get her completely hooked on your cock, I'll reverse the stat penalty from earlier.]

But the system wasn't done yet.

[Actually, let's make this more fun. New mission in-cumming!]

The mission screen flashed before his eyes, blue, bright and bold:

====

[Mission: Hook, Line, and Sinker]

Objective: Completely addict Ochaco Uraraka to your cock.

Time Limit: Until dawn.

Reward: Quirk Upgrade – Elemental Battle Modes unlocked, including "Elemental Mode: Flame Mode."

Failure: Please don't.

====

Yami's smirk deepened as he read the challenge. The system was annoying, but it knew how to tempt him. 

"Piece of cake," he muttered under his breath, leaning down to kiss Ochaco's flushed neck while gripping her wide hips.

His golden eyes glinted with determination as he murmured into her ear. "Ochaco, by the time this night's over, you won't even remember what it feels like not to have me inside you."

She let out a breathless moan in response, her body trembling with anticipation. 

Yami grabbed Ochaco's thick hips with both hands, his strong fingers digging into her soft flesh as he pounded into her relentlessly. 

The bed creaked and groaned beneath them, but neither cared. Ochaco's moans were raw and desperate, her voice breaking as she cried out with every thrust. 

Her fat ass rippled every time Yami's hips slammed into her, the obscene sound of wet skin meeting skin filling the room.

"Goddamn, Ochaco," Yami growled through clenched teeth, his golden eyes locked on the way her ass bounced with each thrust. "You're taking me so well. Tightest pussy I've ever felt—like you were made for me."

Ochaco could barely form words, her brain melting from the overwhelming sensations. "Y-Yami… I—I can't—ah! It's too much!" she cried out, her nails clawing at the sheets as her body trembled beneath him.

"You're fine," he said. "You're made for this. Look at you—you're dripping all over me like you want more."

He adjusted his angle, pushing her legs wider to bury himself even deeper. Ochaco let out a broken scream, her eyes rolling back as her body shuddered uncontrollably. 

The stretch, the fullness, the sheer force of Yami's cock driving into her—it was all too much, yet her body craved more.

Yami's pace only quickened, his hips snapping forward with brutal precision. He leaned over her, one hand gripping her hair and pulling her head back so he could growl into her ear. "Ochaco. I'm gonna ruin this pussy so bad you won't even think about another man."

Her answer was another moan, her voice hoarse as she pushed her hips back against him, meeting his thrusts despite her trembling legs. Yami felt her walls clench tighter, her body spasming as she came hard around him, her juices coating his cock.

"That's it," he groaned, feeling her body milk him. "You love this, don't you? Being fucked like the slut you are."

Before Ochaco could respond, Yami's thrusts grew erratic. His cock throbbed inside her, and with a deep growl, he slammed into her one final time, burying himself balls deep. 

Thick, hot cum flooded her pussy, and Ochaco let out a sharp gasp, her body trembling as she felt him fill her to the brim.

Yami pulled out slowly, watching with satisfaction as his cum spilled out of her stretched pussy, dripping onto the sheets below.

But he wasn't done yet.

Without saying a word, he flipped Ochaco onto her back and pulled her into his lap, positioning her so her thick thighs straddled him. "Cowgirl," he said, his voice low and commanding. "I want to see that fat ass ride my cock."

Ochaco straddled Yami, her thick thighs trembling as she positioned herself over his cock. 

Her round, plump ass hovered above him, quivering slightly with each shaky breath she took.

"Let's see what that ass can do," Yami growled, his golden eyes glued to the way her cheeks jiggled even before she started moving. 

He gripped her hips firmly, his fingers sinking into her supple flesh. "Ride me like you mean it."

Ochaco bit her lip, her cheeks flushed a deep crimson. Slowly, she lowered herself onto his cock, her ass spreading around his thick length as it stretched her pussy wide. 

The sensation was overwhelming, and she let out a shaky moan, her thighs trembling as she tried to take him all in.

As she sank down further, her fat ass pressed against his thighs, the soft flesh flattening slightly before bouncing back into its perfect shape. 

Yami reached up and gave her a sharp slap, the sound echoing through the room. Her ass rippled violently from the impact, the flesh bouncing uncontrollably.

"Fuck, Ochaco," Yami groaned, squeezing her ass tightly. "Look at how much that fat ass jiggles. Keep going. I want to see it bounce."

Encouraged by his words, Ochaco began to move, lifting herself slowly before dropping back down. 

Each time her ass slammed against his thighs, it jiggled wildly, the soft flesh rippling with every impact. The sticky mess between them only added to the lewd display, Yami's cum from earlier mixing with her juices and spreading across their skin.

"Harder," Yami growled, delivering another slap to her bouncing cheeks. Ochaco let out a cry, the sting of his hand sending a jolt of pleasure through her body. 

She picked up the pace, her movements growing more frantic as her ass bounced harder. The wet, sticky sounds of their bodies colliding filled the room, punctuated by the sharp smacks of Yami's hands against her ass.

Her fat cheeks jiggled uncontrollably with every bounce, each impact sending waves through her soft flesh. 

Yami couldn't resist reaching out to spread her ass apart, watching as his cock disappeared into her tight pussy with every thrust. 

The way her ass rippled and bounced around his hands was hypnotizing, and he couldn't help but groan in satisfaction.

"Damn, Ochaco," Yami growled, his fingers digging into her plush cheeks. "That ass of yours is perfect. Look at it, bouncing like it was made for this."

Ochaco moaned loudly, her voice trembling as she tried to keep up her pace. Her thighs burned from the effort, but the pleasure coursing through her body drove her to keep going. 

Each time she impaled herself on his cock, her ass slammed down with a wet, sticky sound, the mess between them spreading further.

Yami leaned forward slightly, bringing his hand down hard on her ass once again. The sharp slap sent her cheeks jiggling wildly, the soft flesh rippling under his touch. 

"You're making such a mess," he said, his golden eyes locked on the way her ass bounced with every movement. "Keep going. Don't stop until you've milked every drop out of me."

Ochaco's breath came in short gasps as she continued to ride him, her fat ass bouncing harder with each thrust. 

Her pussy clenched tightly around his cock, her movements growing more erratic as she chased her release.

When Yami finally came, he grabbed her hips and slammed her down onto his cock one last time, holding her in place as he emptied himself inside her. 

Her ass flattened against his thighs before bouncing back into shape, jiggling slightly as her body trembled with pleasure. Ochaco screamed his name, her body shaking as she came with him, her pussy clenching tightly around his cock.

Her movements slowed to a stop, her fat ass still pressed against his thighs as she collapsed against his chest, panting heavily. 

Yami leaned back, his hands still gripping her soft cheeks as he admired their mess. "You've got the perfect ass, Ochaco," he murmured, giving her one last slap and watching the way her cheeks jiggled in response. "I'm gonna use you all night, until dawn."