How The Tables Have Turned.

As soon as the chains fell apart and crumbled to dust. Irethiel, still weak from lack of strength, fell to her knees.

I bit my lips until they bled, moved towards her, raised her head from her chin, and bit her lip until it began to bleed as well, and soon we exchanged our blood through a kiss.

We went on for about a minute before I let her go.

"Y-You, w-what was that for?" she questioned.

"Huh? Aren't this how demons usually sign contracts?" I said.

"Y-Yeah right, but only succubus do!" she said in an irritated voice while covering her mouth with one of her hands.

"Then, how do other demons sign contracts?" I inquired because the ritual I just performed was based on what I had learned while deciphering the ancient rune book back at Roselia's house.

"We just give them a drop of our blood and cast a slave spell on them," she replied.

"So, why didn't you stop me? Don't tell me you enjoyed kissing me?" I smirked as I spoke.

"A-As you already know, I-I don't have much strength, to even push a punny little human like you," she said in a weak voice.

As soon as I heard her, I took out other advanced healing potions from my inventory and gave them to her.

She quickly devoured them all up after taking them from me. I observed her downing the potions and thought,

"It's fortunate they don't consume human food."

*Huff Huff

She took a breather after drinking them, and her complexation began to alter, and her skinny body was no longer discernible.

'A gorgeous demon, she is.' I thought to myself after seeing her stunning appearance.

Her hair was purple. She had a sinful body, bewitching red eyes, and two horns on the sides of her head.

While her ripped clothing was unable to conceal much of her figure.

After waking up from my trance, I tossed the clothes I had brought for her.

I was staring at her as she hurriedly dressed in front of me before questioning me.

"What?" 

"What happened to your height?" I inquired, as she was significantly taller before drinking the potions, but now we were around the same height.

It would have been a problem if the clothing hadn't had an automatic fitting. I find it to be pretty convenient since they may fit anyone, regardless of height or size.

"I can regain my height as well, but it takes more energy, so I shorten my height instead," she responded.

"Oh, I see-..." But even before I could finish my sentence, she approached me at full speed and attacked me...

***

But, Her hand came to a halt right in front of my throat, as if she was constrained by some power.

"Huh?" She exclaimed as her hand came to a complete stop and refused to move an inch.

When I saw her attempting to kill me, I burst out laughing.

"pftt, Hahahahahhhhaaa...."

I laughed like a lunatic, and my laughter echoed throughout the cave.

"W-What have you done to me?" With a shocked expression, Irethiel exclaimed.

"Did you seriously think I'd believe in a demon?" I finally stopped laughing and said,

"...."

".Congratulations! as of today, ...you are my 'SLAVE'," I said with a wicked grin on my face.

I already made this decision after much deliberation, because I can't easily make her swear allegiance to me, and Demons can never be trusted.

Her life is now in my hands; she couldn't even commit suicide without my permission. And she had to follow all of my commands, so isn't this close to or forced to swear allegiance, or is it not? But I still didn't get any notification from the system about the quest completion...

As I was pondering I heard Irethiels voice,

"S-Slave?" Irethiel expressed her disbelief.

"No, no, no it can't be. I can't be a human's slave."

With unexpected insight, she murmured in a low voice.

'What spell, exactly, did he use during the contract?' She reflected.

Her legs gave out and she collapsed to her knees while her eyes became lifeless.

I left her alone for the time being, allowing her to gather her thoughts and accept her fate.

The contract with mutual terms had a significant flaw that a demon could easily exploit.

I was naive enough before, to believe that I could be on equal footing with a demon.

There was a warning in bold letters in the ancient rune book that I read, that there is NO such contract as equal terms with a demon.

You either become their slave or pawn or... you die.

As I was pondering, Irethiel returned to her senses and scowled at me with hatred.

"Don't act as though I betrayed you, because you came for my neck as soon as you regained some of your energy. You were the one who attempted to kill me, the one who saved you." I exclaimed with a broad smile and continued.

"You don't have a right to play a victim now."

"Y-You're more of a demon than I am!" she exclaimed furiously.

"Well, I will take it as a compliment," I replied with a smile.

"You already had everything planned out from the beginning, right?" she asked.

"Yes, I did," I admitted.

"Then why did you bother pleading with me, as you could already force me into signing a contract?" she questioned.

"Because I needed your consent to make you into my slave," I replied.

"But I never gave you my consent, did I?" she inquired.

"No, You did. You accepted my offer before I freed you and that kiss you enjoyed, was your consent." I replied with a beautiful smile.

"...."

"B-But I said a contract of equal terms, right?" she said hurriedly.

"Oh, did you? You should have inquired further about the details before accepting it... After all, I never agreed to your terms, did I?" I said with a wicked smile and continued.

"It was the kind of flawless contract swindle that is common in the human world. Signing a contract without having read all of its terms and conditions. And as a result, they'll end themself working as a slave for that guild."

"S-So t-the kiss was analogous to you signing a contract? And you already knew I couldn't push you away due to my lack of strength... So y-you took advantage of the situation and completed the c-contract? "She inquired.

"A contractee will always be most vulnerable and unconcerned with the process at difficult times," I spoke while grinning at her.

"You are sneakier than a demon, haha. Are you certain that you are not a demon posing as a human?" She said with an uneasy expression and took a breath before resuming.

"...I take it then, that everything you had previously promised me was part of your plan as well."

"No, what I promised you before is not a lie. I will truly assist you in regaining your peak strength as well as your vengeance." I replied while staring at her, and she returned my stare.

"You don't have any reason to assist me right now, do you? Because you already got what you wish for, and I can't even defy you. So why are you still willing to assist me?" she said, pausing for a moment before proceeding.

"What is your true purpose, human? You already knew where I was detained, and you even know my name, which ought to have been long since forgotten." She finished and awaited my response.

"I can't say much to you right now,... but my goal in assisting you is to make you stronger so that you can be more useful to me. And as for your vengeance, we humans are already hostile to demons, and I'm going to have to confront them sooner or later."

I responded and proceeded.

"Isn't that sufficient justification for me to assist you?"

"So, ...what are you going to do now? You can either embrace your fate and take my hand to exact your vengeance with my help, or you can be a resolute demon who spends the rest of her life in denial."

"...."

After I finished speaking, we were both silent for a considerable amount of time. And I didn't interrupt her while she was thinking.

There was only one option left for her at this point: either she would accept her fate now or she would do it in the future.

After a few moments, she slowly approached me and stood right in front of me, staring into my eyes while I didn't avert my gaze; her height was now roughly the same as mine.

She instantly went to her knees and said.

"Please, look after me...M-Master!"

Hearing her, and seeing how quickly she changed her attitude and accepted her fate, brought a huge grin to my face.

And a sudden notification sound jolted me out of my reverie.

So, I summoned my system and checked the status of my quest.

[SYSTEM NOTIFICATION]

QUEST:- COMPLETE THE FOLLOWING,

1) SAVE THE DEMON IRETHIEL (COMPLETED)

2) MAKE HER SWEAR ALLEGIANCE TO YOU. (COMPLETED)

REWARD~ ABLE TO USE ONE OF IRTHIEL'S SKILLS. (CHECK IRETHIEL SKILLS)

****