The Growth of a Little One
Reciting the Contract of Summoning means belonging to me completely.
I never imagined that my sister, who had rejected the very idea of a contract until now, would be the one to propose it first.
“Suddenly… the contract? Right now?”
“Yes, right now.”
“Why?”
It was a natural question.
To my inquiry, my sister offered a small smile, gently brushing away strands of hair damp with sweat from my forehead.
“Because that’s the only way I can protect you, Runi.”
Is she still thinking about what happened with Ingrid?
It felt a bit late, but the helping hand had reached out just before a full-blown disaster could occur.
“Once the Absolute Contract is formed through the incantation, I’ll be able to find you immediately, even if we’re apart.”
“Yes, that’s right.”
No matter the distance, I can use my Soul Mark to summon the familiar I’ve contracted with.
It means that if something like today happens again, I’ll be able to respond much faster.
“And we’ll be able to hear each other’s voices from anywhere.”
“Yes, that too.”
“That’s why I told you to recite the contract now.”
If the Absolute Contract is completed by reciting the vow, there are countless benefits for me.
Even if my sister is a demon who governs one of humanity’s desires, she wouldn’t be able to refuse the Absolute Command of a complete contract.
If she tries to act on her own whims again, I can simply seal her movements with an Absolute Command.
“Are you… really doing this?”
“Yes.”
A multitude of questions arose, but from my perspective, there was no reason to refuse.
By the way, if a contract with a demon and a contract of summoning collide, which one takes priority?
I suppose I’ll be able to resolve that question soon enough.
"I, Runisia Tiela, use the mark of the Soul Mark as my token and ask of you."
"Will you share your destiny with me and pledge your absolute loyalty?"
⟨ ABSOLUTE CONTRACT ⟩
“Yes, I pledge it all to you.”
“Since your answer holds only transparent truth, I shall engrave the Soul Mark of our contract.”
A brilliant light bloomed between us, and on the back of my sister’s hand, a Soul Mark identical to the one on mine was etched.
With this, the summoning contract was fulfilled.
I could now use the power of the Soul Mark to issue an Absolute Command and force her into complete submission.
“Yes, it’s done.”
“So this is what it feels like.”
“It feels different, doesn’t it?”
“It’s very different. It feels like something is connecting you and me, Runi.”
It would be more accurate to say that an invisible chain is connecting our hearts.
The summoner and the familiar share their lives for an eternity.
The familiar must offer loyalty to the summoner.
These are the two things the summoning contract emphasizes.
“If you can move your body, shall we head home?”
“Ah, yes. I can move a little bit now.”
“Were you so sexually frustrated that you wanted to move on your own while on top of me?”
“Th-that’s… because you were touching me in such an ambiguous way…!”
“You were like a completely different person.”
“Stop talking about it…”
Just as I was covering my face with the blanket in embarrassment, I heard the sound of fingers snapping lightly.
Immediately after, a red gemstone earring settled onto my earlobe.
“Sister, what is this?”
“It’s not a large amount, but this gem will allow you to use a portion of my power.”
“My sister’s power… do you mean the abilities of a demon?”
“Physical ability and magical power. Those two. I’d estimate it’s about 30 percent at most.”
Having returned after finishing her business, my sister continued to devise ways to protect me.
Seeing her act this way makes it feel as if some kind of threat is already looming.
“Sister, you’re okay, right?”
“Yes, I’m fine. I’m just preparing for any unforeseen situations. Because you are the most precious thing to me, Runi.”
Her excessive protection is something I’ve been used to for a long time.
But that was always just over-protection from when I was a human.
Now that I’ve seen with my own eyes that she is a demon and that Gehenna exists, a slight sense of unease seemed to stir within me.
“Let’s go back now.”
“Yes, sister.”
Leaving that unease behind, we left Gehenna and returned home.
The morning after the summoning contract was fulfilled.
“H-heuuuung♥ Huyaaaang♥”
“Haa… heu…♡ Runi’s pussy is the most delicious when I eat it in the morning, isn’t it?”
“Ah, cock…♡ I love your cock…♡”
I thought a morning different from the usual would begin, but the same morning as before repeated itself.
Seeing her cock, standing tall with morning wood, my sexual desire boiled over intensely.
Unable to suppress that boiling desire, I volunteered to be ravished by my sister.
There was one thing I had overlooked in the summoning contract.
It was the sharing of emotions.
To create a deep bond between the summoner and the familiar, the contract causes them to share each other’s feelings.
If the shared emotions are deep enough, they occasionally assimilate.
My sister is a demon who governs sexual desire.
The assimilated emotion was only one thing.
Horny.
“Heugit…♥ Huheuuuung♥ Pu, pussy… it’s bursting…♡”
“Ugh…♡ I’ll fill Runi’s womb with my morning cum…♡”
“Uung…♡ Fill it… fill it up…♡ Huyaaaaang♥”
As soon as I opened my eyes, I started the day with a sticky sex session with my sister.
“Haa… hueuut…♡ Sister’s cum is… filling me up…♡”
Perhaps because our emotions were assimilated, a deeper lingering feeling than usual wrapped around my entire body.
As I twitched with my hips held high, my sister’s hands gripped my buttocks tightly.
“The magical power of the Seal of Lust won’t have a chance to dry up.”
Ever since the Seal of Lust was perfectly filled, my sister’s semen has been continuously filling my womb.
The ability to constantly use enhanced magical power would certainly be a definite advantage.
“Runi, rest for a bit. I’ll make breakfast.”
After gently laying me down as I twitched with my head buried in the bed, she walked to the kitchen to prepare breakfast.
“Ugh… it’s still… trembling…”
My lower abdomen, where the Seal of Lust was engraved, kept throbbing, and this sensation was by no means light.
When I gripped it with both hands to try and calm it down, it trembled even more violently, as if it were resisting.
“It… feels good, though.”
Unlike before, after my womb was filled with my sister’s semen, an inexplicable sense of satisfaction washed over me.
Have I become a body that can no longer live without my sister’s cock?
If so, isn’t that no different from being the exclusive sex toy she wanted so much?
“Sigh…”
Unlike the joy my body felt, my mind was infinitely complicated.
“Runi, let’s eat breakfast.”
“Y, yes…”
Coming out in my panties and pajamas, a table full of breakfast greeted me.
“I’ll eat well, sister.”
“Thinking that I can live like this with you, Runi, makes me smile automatically.”
Does living like this mean a life where we have sex whenever we want without hesitation?
“How about you, Runi? About living like this with me.”
“Me? I…”
I had a goal from a long time ago.
It was to go on a journey after graduating from the magic academy with the familiar I summoned from the Hall of Summoning.
I wanted to accumulate magical knowledge and practical experience on that journey, and grow even more than I am now.
Now that my familiar is a demon, it’s uncertain if that journey is even possible.
“To be honest, I’m not entirely satisfied.”
“Is there something you want to do?”
“Travel. I want to go on a journey with you, sister.”
“A journey?”
In this atmosphere, I felt I could confidently express what I wanted.
After nodding, I continued.
“Traveling to various cities. Accumulating magical knowledge that can only be obtained in those cities, and gaining practical experience by taking on requests from people.”
“So you want to grow even more.”
With my current skills, I’m comparable to a 3rd-grade nationally certified mage.
If I just settle for this and enjoy my current daily life, I’ll eventually become a frog in a well, just marking time.
I want to grow more.
My goal is to receive a 1st-grade ranking in the nationally certified mage exam through endless growth.
“If that’s what you want to do, Runi, then you should do it.”
“Huh? Is that okay?”
“Why wouldn’t it be? I’m happy to do anything as long as I can be with you, Runi.”
I had hesitated to say it because I thought she would insist on our daily life here, but it seems there was no need for that.
“And one of the things I love about you, Runi, is your desire to keep improving.”
“Lo, love…”
The word, which had felt infinitely unfamiliar until now, somehow felt a little more familiar at this moment.
Is this also because of the emotional sharing?
“Then, is it okay if we leave as soon as the graduation ceremony is over?”
“Yes, that’s fine.”
My sister nodded readily.
“I thought you would say you were going to take the nationally certified mage exam as soon as you graduated.”
“Hmm… actually, I have a very big goal.”
“What is it?”
“To earn a 1st-grade mage ranking in the nationally certified mage exam. That’s my goal.”
It’s not common for a 2nd-grade mage to be promoted to 1st-grade, but it’s not as rare as a legend either.
However, there hasn’t been a single case of someone reaching 1st-grade through the state-certified exam in the last 50 years.
I intend to break that 50-year void.
They say the bigger your dreams, the better.
A dream like this is worth holding onto.
For this, I intend to accumulate countless experiences and knowledge through travel.
“When did that little one grow up so much?”
My sister’s rough hand stroked my hair.
“Aaah… what, suddenly.”
“Because I’m proud. I’m truly proud of you, our Runi.”
She was looking at me with eyes that matched those words perfectly.
“You’re saying things my own parents don’t even say.”
“Couldn’t you consider me a second parent?”
“Parents don’t ravish their children, sister.”
“We don’t share blood, so it’s legal even if I do.”
“Huh… that sounds like something a demon who governs sexual desire would say.”
With this, I began to prepare to welcome a new time in my daily life with my sister.