Editing Shinmai Maou no Keiyakusha:Volume 12 Chapter 1 (section)

==Part 1==

The Master-servant vow.
It’s the deepest loyalty one could give to one’s master.
It’s the ultimate form of a master-servant relationship, which could only be reached between a master who’s prepared for his subordinate to belong completely to him and a subordinate who could vow their body and heart entirely to their master.
On the other side of the unbelievable power that came with it, is a forbidden relationship that can’t be erased—among those whose souls are tied together by the master-servant magic, there aren’t many who could reach the master-servant vow.
Therefore, until now it had been viewed as nothing more than a legend or fairytale.
—Nonetheless, the master-servant vow exists.
That reason being Hasegawa Chisato having witnessed the fulfilment of such vow right before her very eyes.
And five of them too.
Toujou Basara, became the absolute master within the space that Hasegawa had created.
The girls Naruse Mio, Naruse Maria, Nonaka Yuki, Nonaka Kurumi and Zest became absolute slaves.
—Hasegawa was the one who suggested the vow to them.
In the ancient past—those expelled from the divine realm became demons, and swearing revenge on the divine realm, came the great power from the master-servant contract magic.
For a divine being like Hasegawa, this wasn’t information she was familiar with.
But, knowing that Basara had tied a contract with Mio, Hasegawa went to collect the information.
Basara is the child of Hasegawa’s Afureia’s  beloved cousin Raphaeline, who had her divine power stripped from her as she was sealed away. A miracle born from Jin of the heroes, Sapphire the sister of previous demon lord Wilbert, and Raphaeline.
If it’s for Basara’s sake, Hasegawa has resolved to do everything she can.
For Hasegawa Chisato, Basara is an irreplaceable person.
She found Basara adorable for refraining from sexual acts for the contract whenever the group was pushed into a corner by an enemy, but also when it came to relieving Mio and the other girls whenever they fall into an aroused state, To top it off, this was all while repressessing his own desire as a man—seeing Basara like that, she couldn’t repress her own desire and entered the bath with him.
She just wanted to tease him a bit. But, Basara washed her breasts lewdly, and even though she held no previous experience with men or desire for romance, Hasegawa felt an uncontainable ecstatic pleasure… Without realising it she kissed Basara.
Basara was unable to control his urges towards her… Hasegawa let Basara do as he desired with her body, she then put his penis between her breasts and serviced him.
For her, it was the first time that someone was able to make such a strong impression as a man towards her.
Hasegawa was unable to contain her growing feelings for Basara.
When Sakasaki Mamoru—Ornis, caused an incident that made Brynhildr go out of control, and knowing that Basara and the others had to go to the demon realm, Hasegawa asked Basara for a secret relationship of a man and woman between them. And then, fulfilling her own feelings as a woman, and for Basara to release his desire, Hasegawa bestowed divine protection upon him.
There was benefit in it, Basara got through the decisive battle with the current demon lord that unfolded in the demon realm by being more resolute. He then returned to Hasegawa’s side.
—On the flip side, she held a cold-heartedness she didn’t hold to this extent before.
Worried for Basara… Hasegawa invited him on a trip to the hotspring. There, he asked her to tell him about his own birth and about herself—Therefore, Hasegawa bared it all. How Basara was born, and of her true form.
She had always kept quiet about it. She had always lied about it, yet Basara was so kind.
He thanked her and told her about how she’s precious to him too.
She could no longer hold back… Therefore, Hasegawa tied both a contract to connect him with part of her divine powers, as well as tied the master-servant contract with him. Altering the time flow within a barrier, in what flowed like a year, she lewdly fell into being Basara’s sex slave.
With that, Basara’s power increased, and Hasegawa became a new trump card for Basara.
But even with that, Shiba Kyoichi managed to surpass Basara.
The strength of the man Basara must defeat—of Shiba Kyoichi, was truly that fearsome.
Shiba had absorbed and corrupted within him the Togami Reginleif. He had manifested Kouryuu within the barrier he had created through the divine vessels, the four gods, and his power in the five elements continued to grow.
To win against Shiba, simply reaching the master-servant vow wasn’t enough.
Mio and the others, all five of them have an element they’re in charge of—converting that to power and sending it through to Basara, flowing it so it’s compatible within him so he could fight on par with Shiba. With this much, in terms of skills and strategy, Basara should be able to fight on the same playing field as Shiba.
It was a risk. Against Shiba who has had everything sorted, Basara had to make miracles happen five times in a row.
Even so—Basara managed to reach the five vows splendidly.
Hasegawa watched as miracles happened one after another.
And then, even though she felt happiness for Basara and the other girls’ attainment of this new strength, what occurred in Hasegawa’s chest was a painful feeling of loneliness of herself being the only one left out in this.
—Because at this point, Hasegawa can’t give Basara her virginity.
If they add Hasegawa’s power, they would then ruin the five elemental compatibility that was built by Mio and the others.
That’s why she has to endure it. That’s why she thought she could endure it.
However,
When she came face to face with Basara in the changing room after he washed off the sweat from his sex with Mio and the others, she was unable to contain her welling feelings.
Even without tying the master-servant vow—Hasegawa’s feelings for Basara are certain.
She shouldn’t have to repress that.
Therefore—Even if it’s only kisses, Hasegawa piled them on Basara’s lips.
Basara allowed that of Hasegawa, and wrapped his arms around her waist,
“Haah… mmm, chuu… nmm… aah, Basara, nchuu… chuu ♥”
Hasegawa, being in Basara’s arms, lost herself in the lewd kisses.
Having just bathed, Basara was naked. Hasegawa was in a babydoll so sheer it was transparent.
As they exchanged bodyheat with the sensation of their bodies, and with just how their tongues intertwined lewdly, she understood.
Basara’s power as he reached the vow with Mio and the other girls, had now surpassed that of her own.
“…Amazing… Basara, you’ve gotten to this point…”
She shook in pleasure in response to the might of her master who had achieved this change.
With that—Basara did more to her, who was as such.
As they kissed, he moved his left hand down from her waist to her butt, then his right hand moved from her back to the front to softly fondle her chest.
Having already felt so much from only kissing, Hasegawa’s nipples stood.
“Mm, aah… Basara, chuu… haah… no… mmm, aaah”
Her chidings had melted sweeter than anything.
With a lewd pleasure that made her tremble, Hasegawa couldn’t stop the lewd happiness that’s overflowing from herself.
For a woman who had completely fallen into being a sex slave, there’s no way that they wouldn’t feel joy from their master’s affection.
With the tempo of the immodest thrusts of her waist, the right strap of her babydoll fell, and in that way, it slowly revealed her breasts… Exposing the lewd shape of her erect nipples.
With that,
“Sensei—“
At Basara whose lips parted from hers, so close that they share a breath,
“Basara… Mm, no… If you do more than this…”
Though it’s a feeling she can’t suppress, even so thinking of stopping—it was at that time.
…Eh…?
Suddenly, there was a sensation at Hasegawa’s crotch.
Looking at it, Basara’s penis which had ejaculated inside Mio and the others, was once again hard.
However, it wasn’t Basara’s penis that Hasegawa was familiar with, it was completely different in size than Basara’s penis which she had serviced with her mouth, hands and breasts.
“…It can’t be… Basara, can’t be this big…”
As a side effect of the master-servant vow with Mio and the other girls, Basara’s penis had grown to an even more impressive size.
“…”
In response to the overwhelmingness of it,
Hasegawa unconsciously gulped down, and she was unable to take her eyes off it.
Basara’s member ,throbbed lewdly with his arousal.
“….Wait. Just now, Naruse and the others girls are calling”
Hasegawa was flustered as she turned her heels back towards the bedroom, and Basara took hold of her right wrist.
“—Sensei”
The gaze of Basara who called out to her again, was without a doubt one that desired service from her, as he held on to her wrist, he led her hand down to his crotch.
With that, Hasegawa could feel the hot sensation of Basara’s hardness, and at that the manly sensation against her,
“….Ah, aaah….”
Hasegawa simply submitted. Though she understood she can’t go for more than this—but if Basara desired for it, she could no longer suppress her feelings.
—Therefore, she could no longer deny him.
Her eyes filled with sensuality, she drew a seductive smile on her face,
“Doing this…. At this rate you won’t be able to come up with any of strategies straight”
“Leave it to me”— as she said that, she slowly moved her hand and began stroking Basara’s member.
—How to pleasure Basara, it’s something Hasegawa Chisato is familiar with.
So Hasegawa, moved her wrist as her slender fingers lewdly worked on Basara’s shaft all the way up to the head, rubbing on it. With that, soon, a bit of pre-cum began to leak from the tip of Basara’s penis. Using the sticky, transparent substance as lotion, the service from Hasegawa’s hand was lascivious. Soon, she could feel even the veins of Basara’s penis’ hardness, and the shape of the head which had thrust mercilessly into the insides of women, as it lewdly stands up.
“…Amazing, to this extent…”
With the increase in size, Basara’s penis felt even more lewd, the aroused Hasegawa, without thinking, began kissing Basara. Basara responded back, kissing with his tongue, further, he groped Hasegawa’s now exposed left breast.
“A,aah… Mm, chuu… Basara… haah, chupu… nchuu ♥”
Hasegawa who moaned sensually, moved her hand even more lewdly to service. With that, Basara’s penis grew even bigger and hotter,
“…”
Hasegawa’s moans mixed with Basara’s breath as they exchanged kisses, his hands moved even more intensely,
“Mmm… There’s no need to hold back, just like this… Cum…”
With her pleading mixed with pleasure, Basara, clinging close to her,
“…Ah, I’m cuming… Sensei”
Just as he said that, Basara’s penis shook considerably—and at the next moment, Basara’s member reached its climax in Hasegawa’s right hand. What he ejaculated is a plentiful amount of tremendously hot semen. And then, as it overflowed hotly from Hasegawa’s hand, it dripped down on to the front of her baby doll, staining the sheer silk fabric with a lewd white,
“Ah… Aaah, mm, fufu… Even though you came so much inside Mio and the others, amazing… haah ♥”
As Hasegawa was spellbound, she changed the movements of her hands around Basara’s hardness to gentle strokes, then, choosing to time it with the calming of Basara’s penis, she let go and opened her right hand.
With that, the semen that flowed in excess on her fingers and to her palm steamed lewdly, and just like that it flowed down to her wrist,
“…Mm”
Hasegawa licked it. Basara’s semen, which she just tasted not too long ago, had a thicker taste and more pungent smell than before, and Hasegawa’s mind melted in its sensuality.
“Mm… chuu, haah… lick, mm… chuu… licks, nfu ♥”
Hasegawa was in a trance, she licked up all of Basara’s semen on her hand. She drank it up while letting it dance on her tongue, and then letting it slide down her tongue and into her like a lewd essence.
“Mmm…. Haah, aaah… ♥”
At the lewd sensation, Hasegawa’s pale butt trembled.
…Delicious…
Her face intoxicated, she gulped down.
As Basara’s cum was gone, her mouth felt lonely…
“…Sensei”
Basara called out to her, like he wanted to bring something to her attention.
As she looked, Basara’s penis which had just ejaculated was erect once more.
The huge penis shivered in what seemed to be pleasure, from the tip to the frenulum, the remains of the semen that he ejaculated on Hasegawa dripped.
Therefore,
“Aaah… Leave it to me”
Hasegawa pulled an enchanting smile, pulling the semen-stained babydoll off from the shoulder straps.
—With a string, she was naked.
And then she kneeled in front of Basara—with that, right in front of her eyes was Basara’s hardness.
Basara’s member demanded service, and with that Hasegawa licked her lips lewdly, and brought her wet lips closer.
—It was then that from the corner of Hasegawa’s eyes, she could catch a glimpse.
At the entrance of the changing room was a bare naked girl—Naruse Mio, who had just tied a vow with Basara.
At the eyes of Mio who looked down at them, Hasegawa’s heated passion cooled down.
“I-I apologize Naruse… In front of Basara somehow, I couldn’t hold myself back…”
Although Hasegawa desired Basara, it could break the affinity built by Mio and the rest. Hence, Hasegawa quickly parted away from Basara.
“No, Hasegawa-sensei… You should continue.”
But as Mio spoke, Hasegawa was frozen still