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Reincarnated as the Villain with SSS-Class Beast-Taming Harem System

Shadeon
7
chs / week
The average realized release rate over the past 30 days is 7 chs / week.
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Synopsis
Warning: R-18 | Mature | Explicit Sexual Content | Harem | Smut (but story-driven with deep lore, adventure, and progression – sex is a reward, not the main focus) León was done. Completely done. Years of relentless bullying—mocking laughs, hallway shoves, cruel messages that never stopped—finally broke something inside him. His revenge wasn’t fists or words. It was darker. More brutal. He slept with his main bully’s little sister… Then with the other’s ex-girlfriend. He knew the consequences. He knew hell would break loose. And it did. They beat him to death. But death wasn’t the end. A cheap-sounding “harem isekai system” dragged him into another world: a brutal medieval fantasy realm of magic, monsters, and power. Now, reincarnated in the body of a destined villain—weak, hated, fated to die early—León gets the SSS-Class Beast-Taming Harem System. Tame legendary SSS-rank beasts. Conquer powerful women who become loyal allies… and lovers . Complete missions to grow stronger, unlock skills, and rewrite fate. Some missions are simple: [Defeat an F-rank monster.] [Gather 100 copper coins.] [Survive one night in the wild.] Others are utterly ridiculous: [Bed the prodigy mage of the Royal Academy.] [Make the princess genuinely smile at you.] [Get the tsundere elf to call you by your first name.] León stares at the floating panel, sighs, and mutters: “Seriously? Same shit again?” But this time… he’s not the victim. This time, he plays by his own rules. Or dies trying. Will the reborn villain build the ultimate harem empire, tame SSS beasts, and crush every “hero” in his path? Or will the system—and the world—break him first? Dark revenge. Overpowered growth. A harem of queens, mages, elves, and more. All in a world that won’t let him win easily.
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Chapter 1 - The Best Revenge

"AHHH! YES, YES, YES! HARDER, PLEASE!" Elyss screamed with a wet moan, shamelessly begging for more.

León, the boy who was on top of her with his penis buried all the way inside her vagina, adjusted her legs to get a firmer position. With that, he started thrusting his hips hard and without stopping.

In that apartment, and even a bit beyond its walls, the only thing that could be heard were Elyss's moans of pleasure.

She was a senior in high school, with short black hair and gray eyes. A complete beauty.

'Oh, fuck… this feels incredible!' León thought as he felt how his penis was squeezed by that hot, wet, tight heat.

Thanks to Elyss's constant fluids, the thrusts slid in and out easily.

"Fuck! Take your load, bitch!" he shouted without holding back.

He pulled back one last time and, in a single motion, buried himself to the hilt, unloading everything inside her.

"Ahggg! G-god…" Elyss moaned, arching her back. Her huge tits lifted as she threw her head back, tongue out.

She tried to breathe better, but between exhaustion and arousal she could only pant.

After a few seconds, León began to pull away, letting her collapse onto the bed, while the semen slowly started to leak out of her vagina.

'Ahhh!'

He leaned back and ended up sitting on one of the apartment's chairs.

He rested his hands on the backrest and let his head fall back, leaving him with a clear view of his semi-erect member, still shiny with vaginal fluids.

He was breathing heavily, but then he looked back toward the bed. And there wasn't just one woman there.

Next to Elyss slept another girl, with brown hair and dark eyes. Another beauty. She was naked, with red marks all over her body, but she slept peacefully, as if nothing had happened.

It was Noira Keller.

"HAHA! They really were complete sluts… this should be enough."

León leaned back fully against the chair, enjoying the scene. No one would believe that a guy like him could end up like this, with two girls like those.

And it was true. He was barely an average guy. He didn't stand out in anything, wasn't good at anything.

Even for his age he was short, barely taller than the average height of the girls in his class: 1.66 m…

His physique also left a lot to be desired. He spent so much time in front of the computer that his back was hunched.

Basically, he was fucking ugly.

But he had one huge advantage over everyone else.

And that was what worked. These two girls couldn't resist a cock that big.

He could 'brag about it', even if only in silence. While most of his classmates barely reached 15 cm, he, by pure genetics or some divine gift, had an impressive 23 cm.

He barely had to insist a little and show his member for both of them to fall.

"I'm not a virgin anymore, hahaha! I want to see the look on their faces when they get here," he laughed quietly.

But it seems they heard him.

Right at that moment, the apartment door opened.

Two boys, wearing the same uniform as the girls—uniforms scattered all over the place—froze at the entrance.

León looked at them and fell silent. He knew exactly what was going to happen.

Both of them barely processed what they were seeing. They dropped what they were holding and, without saying a word, slowly closed the door behind them.

They were Erick and Luke.

His classmates… and the ex-boyfriend and brother of the two girls.

Luke was the first to react. His mouth was open and his eyes were shaking as he looked at his younger sister, Elyss.

Then he looked at León, who returned his gaze with a clear smile, as if saying: "Yeah, it was me."

Luke clenched his fists in rage, but he had barely taken a step when Erick had already punched León straight in the face, knocking him to the ground and making him spit blood.

"You… bastard."

Erick was beside himself. His girlfriend—or rather, his ex—was completely marked by that guy. And the worst part was that her expression clearly showed she had enjoyed it.

León felt an intense pain in his face. Surely a tooth had broken.

Even so, he tried to get up, but he received a brutal kick to the chin that lifted him slightly off the ground before slamming him onto his back.

That blow was worse. With his mouth open, he bit his tongue hard and smashed his teeth together.

This time it was Luke, who lunged at him without caring that he was naked.He sat on his stomach, knocking the air out of him, and began punching him in the face over and over again.

Erick didn't stay behind. He walked to the kitchen and grabbed a wooden bat he used to practice.

León didn't try to defend himself.

He knew this was going to happen.

After all, he had slept with one's girlfriend and the other's younger sister.

His two bullies.

He had suffered bullying since he entered high school, always for the same reasons.

For being 'short' and 'ugly'.

And what better revenge than making them watch as he fucked one's ex and the other's sister.

He had the perfect excuse.

Noira was a complete slut, a lover of cocks.

She had cheated on Erick with several friends. Even with Luke, his supposed best friend.

On top of that, the fucking slut had shown him a naked photo of himself, which she planned to use to blackmail him if he didn't sleep with her.

'How the hell did she get that photo?' he thought, not caring about the beating.But it didn't matter.

He took advantage of all that for this day. It was early morning, he knocked on the apartment door and 'pressured' both of them.But they barely resisted.

"I-it was incredible…"

With broken teeth and his mouth full of blood, León murmured those words, barely audible.

The last thing he saw, with his vision blurred and darkness closing in, was Erick raising the bat straight toward his face.

Tash!

Then, calm.

Total calm.

He felt nothing. No pain. No pleasure. Nothing.

'So what's supposed to happen now?'

He didn't even know if that was a thought.

In the middle of the darkness, a translucent screen appeared in front of his eyes?

[Harem System: initializing...]

[Progress: 10%... 40%... 70%... 99%]

[System initialized successfully]

[Notice: Do you accept the conditions of the harem system to reincarnate in X-XX?]

[Yes / No]

'Huh?... What the hell is this?'

He was completely confused. Reincarnate? And what the fuck was X-XX?

[Harem System]

[Notice: The user is taking too long…]

[Update: You will be automatically sent to: X-XX]

[Recommendation: Do not panic. Any reaction that harms your entry into this new world will be punished.]

León didn't respond.

A blinding light suddenly engulfed him.

'God… my eyes!'