Summoner: Monster Girl Harem!

He struggled to his feet and glared at her coldly; the daemon woman approached slowly, with her hands behind her back and a nasty grin upon her lips.

'Damn, it's not as bad as before though she's fucking powerful!'

"What's wrong, Vincent? Been waiting for me?" Her tone was deep, almost calming, contrasting her intimidating aura.

"You know I'm no longer your plaything, so cut the crap and come at me; I'll show you my real power."

Her cute little face showed a small smile, leaning her head against her right have before giving him a playful wink. Before she stepped closer, he could feel his heart throb from just her simple actions.

"My, my, my~... That's right. We have never tested each other's true strength before, do we? Well, I can't wait to see how you'll fight me, Vincent~!"

Astaroth smirked, unfazed by Vincent's words; she waved her hand and produced a dark light, which wrapped around her palms like gloves empowering her scales and power.

"Well then..."

Astaroth readied herself in front of Vincent, awaiting his movements, her hips lowered, will shifting her legs apart.

It only took a few moments before she finished forming the move in her mind. She placed her right foot back while moving her left forward, turning her back to Vincent and spinning in an arc before producing a palm strike aimed at his chest.

Astaroth kept her eyes shut as she made a move; if she had used her sense of sight, she would not be able to make the correct timing to execute the palm strike.

Once the strike had been executed, Astaroth spun and then sent the palm strike back at Vincent from a new angle to create a cross-style attack and punched him, aiming to take out one of his limbs with her fist.

She missed the first attack, but her aim for the follow-up was true.

As expected, Vincent reacted and blocked the punch using his spear with a slight twist to counterattack Astaroth. He twisted the spear slightly to redirect the blow away from his own body to hit the daemon woman instead.

But of course, this just pissed off the daemon woman even more; she leapt forward and lifted her upper body straight into the air, her mouth opened in a wicked smile, and she spat venomous saliva.

Then the spikes appeared.

"Damn, she's fast..." Vincent cursed under his breath as the daemon woman took a step back to gather herself and prepare another attack; she moved quickly between each spike, ready for the next moment.

"And strong..." Vincent muttered to himself as Astaroth kept her position, preparing to attack him again in the next moment.

Vincent did not want to let his guard down in a fight against Astaroth, so he took care of every attack coming at him to counter and strike back. The daemon woman also seemed to notice this as she backed away and held her attack for another moment.

"Okay, now..."

Vincent charged; it was his chance.

His charge was aimed at Astaroth's head, hoping she would fall prey to a spear thrust to the skull; Her body moved quickly with great agility. As he neared her with his spear, he saw her jump away and spin her body around, launching herself at him with a kick.

The impact was tremendous as she connected with his chest and sent him flying backwards; he crashed into a tree and fell, sliding along the bark and leaving a trail of blood on the leaves as his lungs screamed in pain.

Astaroth, meanwhile, was standing tall with a smirk on her face, as if she enjoyed beating Vincent.

She is a natural-born killer without fancy skills or training; she has a warrior's mindset and always tries to kill her opponent at all costs. This mentality was shown during their fight when she tried to kill Vincent with a single blow.

"I told you not to underestimate me, Vincent..." She spoke calmly, wiping her boot to clean off the blood left behind.

"I may be a bit too hard to handle..."

The daemon woman swung her arm again, producing a lightning-like attack directed at Vincent. Still, the lightning ended up hitting the tree he had crashed into earlier, sending shockwaves throughout the area and creating the sound of cracking branches and breaking wood.

That sound caught Vincent's attention; he looked up and saw Astaroth smiling at him, gesturing for him to stand up.

"Hmm," Astaroth sighed.

"Looks like I didn't knock you out after all..."

Without another word, she rushed forwards with a roundhouse kick, aiming to smash into Vincent's face. She was fast enough to dodge his spear, but if the kick had landed, it would've slammed into his head and sent him crashing onto the floor, possibly unconscious or dead.

He had to be quick about it.

But then, as if on cue, Vincent threw his spear at the spot the daemon woman intended to land. He got lucky; the spear glanced off her leg, sending her stumbling back.

"...?!" Astaroth groaned, looking down at the spear embedded in her thigh. Vincent grinned.

"Ha! You're not as invincible as you'd think, are you?" he taunted. "Come at me!"

He got his wish.

Astaroth swiftly leapt back, shaking off the pain of the spear in her leg as she readied herself for another attack.

"Please, Vincent..." Astaroth pleaded softly as she attempted to regain her composure. "This isn't...right..."

She frowned deeply, turning her gaze towards the sky with disgust; her body began to shudder in anger and strange feelings that Astaroth couldn't understand well before her eyes returned to his body.

"Your attacks are...unfair. They aren't...humanly possible."

Vincent chuckled.

"Haha... you are not dealing with an ordinary human, Astaroth."

He dashed forwards after summoning his spear back to his hands, a strange aura building up within his body as his flames began to wrap around his body.

"I'm...a daemon."

Astaroth did not hesitate to move either; she held her two arms wide open as she closed the distance between them, ready to unleash another palm strike.

'No, this isn't right!' she thought, pulling back her arm.

The moment before she did, she changed her mind, producing a small ball of fire in her palms and throwing it at Vincent.

Her black fireball was fast, but luckily, Vincent could react in time and block it with his spear, yet the attack was powerful enough to make the ground rumble where it landed. Countless animals and trees were burned to ashes by her powerful spell.

"No! Brother, you are not allowed to fight back!"

The daemon woman growled in annoyance as she glared at Vincent, clearly unsatisfied with what had happened.

'Brother is stronger... Brother will punish me... I must kill him, make him love me!'

Her body seemed to shake as the lightning crackled from her twisted horns, a mighty wind swirling around her body, and the slight tears in her eyes began to evaporate as her look became more wild and fierce.

"Well, I guess it wasn't fast enough to hit me," Vincent said. "Maybe next time..."

Vincent pushed the spear forward, holding it close to her exposed neck before taking several steps forward with a huge grin; even though they were enemies, memories of her hot, slimy mouth and the taste of her warm juices filled his mind.

'What's going on!?'

Astaroth's eyes began to glow brightly, a pink-like seeming to use her charm to the limits. However, this time, he didn't become her slave and became aroused as she saw that mythical beast in his pants raging.

'Why? He should be on his knee's begging me for forgiveness... with his face buried between my thighs, making me feel good like last time... Every night....'

The pair didn't realise that during his time in the hidden realm training, that doll was always connected to Astaroth.

'Brother, you were so fierce... Almost breaking my jaw every night....!'

Though her body was frozen in time, it was like a long dream for her to spend each day happily fighting with Vincent, sucking on his giant member at night when the blonde girl couldn't swallow anymore.

Astaroth awoke when she returned with more than six months of intense, thick memories with Vincent, which slowly began to change her thoughts, now dreaming of him every time she closed her eyes.

'That thing, why did it taste so good in my dream! No... Astaroth is being charmed by her bad brother; this cannot continue! Mother said that the moment a woman loses to the man she loves once, it's over! Because Astaroth loves brother sooooooooo~ much!'

"No..." She muttered quietly, staring at Vincent.

Vincent ignored her words, lowering his guard as the sharp red blade pointed towards her soft red lips, while Astaroth moved slower, eyes darting around her brother's body, fixated on his waist and lips as if entranced.

She had been caught by his extreme charms this time, slowly feeling herself becoming his prisoner before she turned her body, desperately trying to stop her burning body, now filled with lust and the desire to copulate with her brother.

Not kill him, she grits her teeth so hard blood begins to ooze from her lips.

"S-stupid brother! You win this time! Hmph! Next time..... Next time, Astaroth will beat you up and make you her slave!"

The scene felt anti-climatic as his strange, yandere sister flashed out of his sight, dodging the fierce lance he pierced forward, only tearing the air apart with a loud gust of wind.

"Damn!"