Shinji Kamiya, an office worker in his twenties caught up in the Demon Capital Disaster, had been running for his life from the ferocious monsters inhabiting this otherworldly land.
Just as his situation seemed most dire, he coincidentally met the captain of the Demon Defense Force's Seventh Unit. With her cooperation and the benefit of the 'Demon Capital Peach' Kyoka provided, he managed to escape the predicament and somehow come through unscathed.
However, his relief was short-lived. For some reason, that person suddenly, as if by impulse, claimed his lips.
'Wh-Why all of a sudden...?'
Due to their height difference, she had to stretch up slightly while he bent forward a little for the kiss to connect.
To be precise, it was more accurate to say Shinji was trapped in an inescapable situation, as Kyoka had firmly wrapped both arms around his neck, pressing close.
"Mmmph... Haah..."
"...Uh... mind if we... talk for a sec?"
He seized the moment when she pulled back for air to speak.
"...What is it?"
"Well, it's just... why did you kiss me...?"
"...It's the compensation for my ability."
"...Compensation?"
When he asked what she meant, she answered straightforwardly.
To summarize, her unique ability, "Eternal Chains (Slave)," apparently obligated the master to directly give a reward commensurate with the work done by the slave.
Moreover, her body moved automatically to provide this reward regardless of her own will; it was by no means something she did proactively.
"I... I didn't think it would turn out like this either... When the ugly demons were my slaves, giving them pork was enough."
"...I see."
Shinji had thought, given her personality, she'd be used to this sort of thing, but he revised that assumption.
In fact, the slightly bowing woman before him wore an expression mingled with shame.
However, upon reflection, even in response to his joke before the enslavement, she had flustered and seemed embarrassed. Thinking of it that way, her explanation made a strange sort of sense.
"Sit... down..."
"...Right."
Obedient to the softly spoken command, he smoothly lowered himself to sit on the ground.
Shinji probably guessed that asking her to repeat it would only earn him more displeasure.
Sitting cross-legged and waiting, he watched as the woman before him settled herself between his legs, sitting down.
Objectively, it was a position akin to a facing seated posture, but he felt pointing that out would be tactless.
Kyoka removed her military cap, her face flushed and slightly sweaty, and they faced each other in silence.
"You... you pervert..."
"..."
Though the insult was harsh, he offered no retort. When she brought her lips close again, he accepted without refusal.
"Mmm... Smack..."
'She's cute.'
Naturally, his hands went around her waist as she clung to him again. With his other hand, he gently stroked her beautiful hair, fingers combing through it from the back of her head.
For a moment, Kyoka looked surprised, but gradually, she slowly closed her eyes.
...Smack... Smooch... Smack...
As their deep, probing kisses continued, as if confirming each other's presence, she suddenly grabbed the hand that had been stroking her hair and pulled it to her own chest.
'Even if it's compensation for her ability... to end up like this...'
Against his palm, even through her clothes, Shinji could feel the full shape and softness of her ample breasts.
However, he made sure not to knead them roughly, moving his hand with a touch so light it was almost just contact.
After all, her body was currently moving on its own, unrelated to her will. The acts being performed were neither invited nor desired by her.
"Tch... Haah... Y-You're going this far... Tch..."
Precisely because of the humiliated expression on her face, and combined with his own desire not to subject her to further disgrace, he proceeded with caution.
"Y-You're quite... mmm... b-bold, aren't you... Nngh..."
"...Well, I mean... with a beauty like you, it's only natural for a man to..."
"Shhh... Slurp."
As if to tell him not to say unnecessary things, Kyoka wordlessly sealed his lips again.
Shinji seemed to have chosen the wrong option. This time, a slick tongue slipped in, and he reciprocated in kind, licking back.
...Sllursh... Schlick... Smooch... Lick... Slurrp…
Even as the heated, deep kiss continued, he kept touching her chest.
Then, gradually, he became enveloped in a sensation of something rising from deep within her core.
It was, of course, sexual arousal. And as that happened, that place of his began to react as well, swelling and bulging insistently within his trousers.
Trying desperately to keep her from noticing, he attempted to continue the caresses while hiding it.
However...
"Tch! Pah!"
Sadly, she seemed to have noticed. Moreover, the translucent bridge of saliva connecting them broke in an instant.
"Wh-What the!? ...Nnngh!?... Wh-What is... this...?"
Since she was sitting atop him on the barren wasteland ground, it seemed he couldn't hide it after all. Her eyes widened in shock at the prominently tented area, then she glared at him with a look that screamed 'lecher'.
"S-Sorry... but, please forgive me. It's just... a man's nature, you could say..."
"..."
Even as Shinji apologized, her cold gaze remained fixed on him.
But, separate from that, her eyes were locked onto his lower half with a strangely heated stare.
Kyoka even gulped audibly.
'A m-man's... penis... is it really... this... big...?'
Throughout her life, she had walked a path with almost no interaction with the opposite sex.
And now, as compensation for using her ability on a man for the first time, Kyoka was forced into sexual service, subjected to one unknown experience after another.
'It's... huge...'
Of course, she had endured, reluctantly, tossed about by her disobedient body. But perhaps as a result, some strange switch had flipped, or maybe a woman's instincts had begun to stir.
Unconsciously, her hand reached out and touched the large, unmistakable bulge of his cock, even through the fabric of his trousers…