Isekai Slave Master

"What is the power you have been blessed with?"

Kakeru appeared calm as he knew that the old man would ask this question.

"It's an auxiliary type-power that allows me to control people."

He answered in a way that wasn't a lie but not the whole truth.

The old man's eyes glistened as he stared at him and then nodded as if realizing something.

"I see that would explain the loss of control."

"The loss of control?"

"I had suddenly lost control of Kasumi-chan so I was curious what ability you had that could break my seal."

Seal? This old man is sicker than I initially assumed.

"Your second question."

"Ah, yes. Let's see...Rather than a question, this old man has a request if that is fine."

"A request? Let's hear it first."

"There is something that in my possession that I have been unable to control. I was wondering if you could settle it down."

Kakeru looked at the old man silently for a few moments before consenting.

"Great! Looks like things have been settled. Kasumi-chan will guide you to the thing in the basement so after things are done there you can take her and the products you purchased with the mistress and go."

Hearing the old man wrap things up so abruptly confused him but he didn't question it as he followed Kasumi outside.

"What an interesting you man...Intelligent and cunning but with such power he's not a threat."

The man's eyes suddenly turned blood red as his face distorted more and more.

...

Kakeru was once again led through this confusing structure as he didn't even bother trying to learn the layout of this place.

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He stared at Kasumi's back and found his brand on her neck like the other girls but it wasn't as clear.

It seems the branding process was incomplete cause of that old man's seal.

"Wait." He ordered Kasumi to see how she would react to his order.

Her body suddenly stiffened as she struggled between moving and stopping which created a weird scene that made it seem as if she was having a seizure.

He walked over and restrained her then took off her skirt and panties.

He was worried about Erika and Monica plus the scarlet lady so he decided to be quick.

This time Kasumi didn't resist as she stood blankly allowing him to do what he wanted but a faint blush could be seen on her face.

He lowered his pants and he quickly lined up his erect dick with her pussy.

She wasn't as wet as he wanted so he pushed his face against her vagina and began licking to the outside of her vagina.

He then stuck his tongue inside of her vagina while rubbing her clitoris.

"Mhmm."

A faint moan came from her mouth as he gazed surprised at her face finally noticing the faint blush.

It seems she is slowly changing.

He continued his actions until her vagina was moist but unused to the pleasure her legs involuntarily gave up as she fell down.

He smiled as he picked her up and placed her over his dick and let go while holding her hips.

Kasumi's eyes widened in surprise as she involuntarily wrapped her hands around his body.

Moans leaked from her voice as signs of consciousness started to appear.

Without waiting, he immediately began thrusting in and out of her as she moaned in response to his every thrust now.

The pleasure began to accumulate as he started to feel heat rising from his lower body as he knew he was soon about to climax.

He suddenly thought of something as he lowered her body onto the ground and had her crouch while sticking her ass towards me.

He then focused on her asshole that had become wider after their experience earlier.

Spreading it open with his hands he centered his penis and pushed slowly inside as there was comparably less resistance than the previous time.

"Waaa."

The strange sensation caused Kasumi's expression to loosen as the brand on her neck was starting to become more visible.

He started thrusting inside of her asshole and as he was already close to climaxing, he quickly came as a deep load flowed into her forbidden hole.

"Ahh!"

Kasumi slumped to the ground.

Her eyes were rolled upwards and her tongue stood outside of her mouth as she looked to have totally lost control of her body.

He realized he may have gone a bit far as he ran a couple more rounds in her pussy until she recovered.

Which took a while as he kept cumming inside her making her pass out in pleasure.

...

As she finally recovered, her clothes were in a mess and there was semen dripping from her vagina as she shakily guided him towards the underground basement.

He took away her panties and skirt so he got to watch her shakily walk in front of him with semen dripping from his vagina.

Entranced by the sight, he had arrived at the destination before he even knew it.

Kasumi stopped as he looked around and found he was in some sort of cave.

His eyes gradually adjusted to the darkness as his heart almost stopped when his eyes landed on what laid in front of him.

"W-what is that?"

In front of him was a monster hundreds of feet long with silver scales.

It had wings and a tail so judging by its appearance he assumed it was a dragon but he wasn't sure.

"It's a Mercury Dragon."

"A Mercury Dragon?" He asked confused.

Mercury as in that metal? He thought.

"A member of the elemental dragons of order, it's existence tracks back thousands of years before humans had even existed."

"Hmm."

He blankly stared at the monstrosity that could kill him by accident rolling in its sleep.

Kasumi suddenly walked towards him and handed him some sort of talisman.

It had a blood-red color and a strange character he couldn't recognize.

"What is this?"

"I was only told that it will function if you rip it."

He hesitated before ultimately ripping it as a bright blood light flashed and the dragon woke from its slumber.

Spotting the blood-red light, it tried to flee but it was too late as it got hit by the light and started to scream in agony.

What the hell is going on !?

After a while, the blood light faded and the dragon disappeared.

Confused, he looked closely and found a small girl lying on the floor in front of him.

Wait...Don't tell me.

He examined the little girl's body and found small silver horns on her head.

The dragon turned into a girl...?