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Siwoo only had one memory of sex.

And that was the anal sex he had with the twins.

Despite that, he vividly recalled that sensation, perhaps due to them having done it multiple times.

By comparing that experience to his current experience, as he rammed through Yebin’s hole, who had her legs spread widely as she moaned, he managed to distinguish the difference between anal sex and normal sex.

“Haah…aaa…ngg…”

First, the sensation he felt the first time he inserted his rod.

With anal sex, he was greeted by a strong force right at the entrance, followed by a clingy mucous membrane. It was as if his cock was squeezed by a rubber band.

On the other hand, he didn’t feel much difficulty when he inserted his cock into Yebin’s pussy.

With her specifically, it felt like the head of his cock was sucked inside.

Then, inside, he was greeted by wet and sticky juices that covered the rough bumps around his cock.

Next was the movement.

Compared to the challenging back-and-forth motion of anal sex, he had an easier time thrusting. It had less stimulation, but it felt more cozy.

If he used fellatio as a comparison, anal sex would be like when someone gives him a vigorous one, whereas regular sex is like getting one in a hot spring. At least, that was how he felt,

Then again, he wasn’t entirely sure.

He realized that it wasn’t easy to come up with metaphors.

Lastly, with anal sex, it felt like he could shove his rod as deep as he could, while there was a limit with regular sex, which was when the tip of his rod bumped with the soft and squishy cervix.

And whenever that happened, Yebin would twist her body in pleasure.

“M-Mr. Siwoo! M-More…! Haaa! I-I love— I love it…!”

“Fuck!”

However, he didn’t only find the differences.

He also found similarities between them too.

And that was the feeling when his partner tightened her body in pleasure, intermittently gripping his rod even tighter.

“I-It feels— I-I’m going to cum— Mr. Siwoo! Ahhh…!”

With a trembling voice, Yebin arched her back.

Thick juice oozed out between the narrow folds where Siwoo shoved his rod in.

At the same time, Siwoo felt an intense pressure enveloped his entire shaft.

“Ugh!”

This made him stop his movements as he waited for Yebin’s climax to subside.

While he had experienced similar things while doing anal sex with the twins, it was harder for him to resist those feelings this time. Yebin’s inner walls would cling to him even tighter than the twins’ every time she reached climax.

He had a feeling that if he kept on going like this, his rod would be crushed inside her.

“Haa…fuck…”

Even after her orgasm subsided, Yebin’s pussy was still twitching, trying to tease and stimulate the cock inside it.

Siwoo involuntarily spat out a curse in the midst of the intense pleasure.

He took a moment to rest while looking at Yebin, who was lying on her back in the bed.

Her ample bosom spread out with each breast gently slid to the side.

Whenever he moved his hips, they would either move up and down or collide with each other, creating a nice and crisp sound.

It sounded like clapping hands.

And that sound seemed to awaken Siwoo’s primal instincts, giving more vigor to his already erect cock.

‘It’s still unbelievable to see her huge racks. How could she carry those with that slender waist and flat stomach? Speaking of, her belly button looks cute.’

Siwoo’s eyes crawled all over her body, as if he was licking her up.

“Ahhh… Mr. Siwoo…”

“Yes?”

Realizing that he might have made her feel uncomfortable with his stare, Siwoo quickly turned his gaze away.

“Ah…ha…. C-Can you…talk dirty again…? C-Can you curse at me…?”

“What?”

‘What is this out of a sudden?’

At this moment, he remembered his conversation with Takasho.

It was probably around the third year they had known each other.

‘Yo, ain’t there a shitload of chicks who are into some masochistic things?’

‘What? Stop bullshitting. Those girls were most likely pretending because they were desperate.’

‘Nah, I’m not bullshitting. You know, whenever it’s time for the main event, those girls would get all excited. At first, they’d mix up a bit of role-play without feeling embarrassed. Then, they’d start going, curse at me, spank my ass, choke me and so on. Seriously, things’ll get crazy before you know it.’

‘You need to stop reading porn.’

‘Seriously, you’re no fun… Anyway, wanna know what you should do if you get into that kind of situation?’

‘Not interested.’

‘No, really, listen to me. Pay attention now so you can use the knowledge later on Professor Amelia. You don’t want to turn her off with your amateur act, do you?’

After that, Takasho poured out his own know-how to Siwoo, who was half-listening at that point.

However, for Siwoo, who had zero experience with women, those know-hows came in a clutch in a situation like this.

‘Remember, to catch the dragon, aim for the eyes that aren’t protected by its scales!’

“Haah…. Mr… Siwoo…? Are you okay…?”

To think that the tips he deemed useless would find its use this way.

Seeing her calm demeanor, Siwoo never expected that things would turn out like this.

“Can you cover your eyes for a moment?”

“My…eyes…?”

“Yes… Sorry, I can’t bear to look at your eyes…”

However, the moment he saw her innocent eyes, he couldn’t bring himself to spout any curses at her.

Even though he knew that it was merely part of the role-play.

“Ah… But, I don’t really want to… How about we do it like this…?”

Yebin slowly turned her body, ignoring the fact that Siwoo’s rod was still embedded deeply inside. Then, she exposed her buttocks to him.

From behind, her round buttocks stood out.

“Can we proceed… Like this…?”

When they first met, the atmosphere around them was awkward. Until a while ago, they managed to have a pleasant conversation, breaking the previous atmosphere. But, he never thought that things would proceed beyond that.

A pretty woman such as her was offering her plump ass to him, waiting for him to mess up her insides while hurling curses at her.

Because of the position change, there was a shift in the shape of her insides. Due to this, Siwoo felt a different sensation from his thrusts.

It felt tighter and filled with more curves.

And that fact already felt good enough for Siwoo.

‘Anyway, what should I say to her?’

‘First of all, I don’t think I need cheesy lines for this, so I can count them out.’

In the end, he decided to pick one of the vulgar phrases he had heard from Takasho.

“Hey… Uh… You busty bitch…?”

“H-Hiii—yaak…!”

He blurted those words out, not sure that it would even work.

But at that moment, Yebin’s pussy tightened around his cock.

It wasn’t as intense as when she reached climax, but this definitely happened because of the dirty talk.

“You slut…?”

“Ahhh…!”

When he tried it again, it seemed to work again.

He felt a strange sensation.

Back when he heard those words come out of Takasho’s mouth, he could only look at him doubtfully. But now, when he actually witnessed the effect…

“Haa… W-Why…aren’t you…moving…?”

With a longing gaze, Yebin swayed her hips seductively.

Every time she did that, Siwoo felt a jolt of pleasure running through his shoulders, prompting him to explore various angles of penetration.

He gulped before continuing.

“You’re the one who should move, you little slut.”

“Haaang…! Yes! Y-Yes…!”

Siwoo didn’t have a clear idea about what kind of person Yebin exactly was. But he was certain that she was an outrageous pervert.

As soon as his command fell, without any hesitation or resistance, she began to sway her hips back and forth.

“Unghh…! Haah…! M-Mr. Siwoo…! Y-Your cock…! I-It’s too big…!”

She easily succumbed to the overwhelming sensations.

Regardless of the depth or angle at which Siwoo inserted his rock-hard rod, Yebin’s inner wall would wrap itself tightly around it, as if begging for more.

Thanks to that, his bulging rod was now coated with her sticky juice.

“Ungh…! I-I…like…it…!”

With each deep and forceful thrust of his long and thick cock, Yebin couldn’t help but lose herself in pleasure.

Despite that, she never ceased the lewd movements of her hips.

“M-More, please… C-Curse me more…”

‘I’m not a man if I don’t oblige now, aren’t I?’

Siwoo firmly grasped her wide hips.

While Yebin’s movements brought him pleasure, a perfect sensation to feel on his first sex experience…

He still wanted to experience the moment to the fullest while taking the lead.

“What kind of words do you want to hear?”

“A-Any— Ahh! Anything! A-As long as you…degrade me…”

“Are you sure?”

“Y-Yes… Ahh!”

After hearing her request, Siwoo forcefully plunged his rod before gripping her hips and the area where her side waist met.

Simultaneously, Yebin collapsed in ecstasy.

Her trembling legs showed just how much she enjoyed it.

“Ms. Yebin, do you know that your pussy is so cheap?”

“S-Sorry…?”

“I mean, look at it. As soon as I shoved my dick, it went in without me having to move.”

“Y-Yes! M-My pussy…is cheap! I-It’s pathetic…! T-Truly…!”

Siwoo, who initially felt a little awkward for doing so, gained a boost of courage after hearing her enthusiastic response.

He then thrusted his hips forcefully before smacking her butt cheeks.

The pleasure he felt before he started the act was incomparable to the current sensation he felt.

“Look at you squirting like a sprinkler. Fucking bitch!”

“Haang! Y-Yes! I-I gush out juices like a sprinkler!”

“Look at this loose pussy. You sure you haven’t just given birth to a triplet before this?”

“Nggh…! N-No! W-Witches can’t get pregnant—! I-I can’t—!”

“Then, I’ll make you pregnant.”

“P-Please do! M-Mr. Siwoo, I-I’ll bear your baby—!”

After he unleashed all the vulgar words that came to his mind onto Yebin, he gradually felt that he was about to climax.

And at the same time…

-Wooong!

A strange, vibrating sound, accompanied by vibrations that would never occur in a normal sexual intercourse caused Yebin’s branded womb to tremble.

“H-Haah! S-Stop! I-It’s too much—!”

Siwoo barely even moved, yet Yebin had screamed and moaned on her own.

Her eyes were half-covered due to pleasure. She desperately pleaded for him to stop, but all the mana in her womb began to be absorbed into his cock.

Beneath his eyepatch, his left eye gleamed with a golden hue. At the same time, Yebin felt all her mana was sucked into his rod that came into direct contact with her cervix.

“S-So good…! M-My mind! M-My mind is breaking—!”

Right before the climax, the concentrated mana surged through Yebin’s pussy, electrifying all the erogenous zones inside it like an electric shock.

This was the sensation that she could never replicate through masturbation.

“Ugh!”

Siwoo poured his hot load of cum inside Yebin’s pussy, which was still trembling up until that moment.

-Splurt! Splurt!

“Ohh…! Haaanng…!”

In response to that, her pussy started twitching, sucking in even the remaining semen in his urethra with all its might.

This time, transparent mana began to surge into her womb from within Siwoo’s body.

Passing through the narrow cervical passage, power filled her womb, flooding through the fallopian tubes to her ovaries.

“Haa…ahhh…”

Feeling a haze clouding her mind, Yebin collapsed in that very state.

Meanwhile, Siwoo was caught completely off guard by the unexpected outcome. He could only touch his left eye in a bewildered manner.

“W-What is this?”

At the moment of climax, the mana that escaped from Yebin’s uterus was being absorbed seamlessly by him.

Then, his brand amplified it before returning it to her.

As a result of that, his brand was now brimming with an overwhelming amount of mana.

Likewise, Yebin’s brand was also in the same state.

“Uhh…”

Before Siwoo, the witch lay sprawled in a pathetic and helpless posture.

Her swollen, reddened pussy convulsed, expelling thick and sticky semen from inside it.