The Steel Knight's Hidden Weakness (3)
The seventh training ground lay shrouded in the dead silence of night. Isabel Martinez stared blankly at the small white vial Tusma held out to her, like a prisoner awaiting her verdict. The black elixir bottle clutched in her own hand felt unnaturally cold against her palm. One promised ruin, the other whispered salvation. Her ironclad convictions were crumbling from the roots.
“...I still don’t know what you really are.”
Isabel’s dry lips finally parted. Her voice, stripped of its usual icy composure, trembled faintly. The quiver wasn’t born of rage or fear—it was the feeble resistance of someone who had already surrendered everything.
“How did you learn my secret…? And how did you even know I’d be here…?”
“Didn’t I already tell you? Your pain is what led me here.”
Tusma took another step closer. There wasn’t the slightest hesitation in his movement. The invisible Paint of Corruption rising from his body began to slip effortlessly through the mental barriers of a severely weakened Isabel.
The massive crack created by her self-loathing and guilt from what had happened earlier that day. Through that fissure, the corrupting mist crept in like smoke. Her powerful magical resistance was utterly helpless against the contempt she felt for herself.
…What is with this commoner’s eyes? That arrogant gaze, as if he knows everything about me…! But why… why can’t I argue back in front of him?
Isabel thrashed desperately inside her own mind, but her body felt as heavy as lead.
“Pain…? You, a mere commoner… dare claim you understand my suffering?”
Isabel sneered, but her eyes held far more desperation than contempt. She wanted someone—anyone—to acknowledge her pain. In this disgusting situation, the fact that she was craving comfort from the very commoner she despised most filled her with self-disgust.
“Of course I do.”
Tusma looked straight into her eyes. His pupils were like deep, tranquil abysses, and Isabel felt herself being helplessly drawn into them.
“You were taught that you must always be strong. For your lord, for your family—you had to kill your own emotions. But today, you trampled over the helpless and weak.”
“Ugh…”
“You committed the very act you despise most, all because your precious lord, Elara Bonhelm, ordered it.”
“That… that was…”
“Your blade has been stained. Your pride as a knight lies in shattered pieces. And to forget that pain, you’re trying to rely on even stronger power—this cursed poison.”
Every single word from Tusma’s mouth was a razor-sharp blade carving into her heart. He had seen straight through her soul.
“Ugh…”
Isabel felt like she couldn’t breathe. The ugly truth she had been avoiding even from herself had been completely unearthed by this commoner.
“……Shut up.”
“I won’t.”
Tusma gently cupped her chin and lifted it. Unlike the cold metal of her armor, the bare skin of her jaw felt surprisingly soft. Her deep hazel eyes shook violently with despair and confusion.
“You are strong, Isabel Martinez. But that strength must come from yourself, not from some cursed poison. Throw away that black elixir. And take my medicine instead.”
“S-something as suspicious as this…”
“This will not destroy you. It will make you truly strong.”
His voice carried an irresistible power. Like an ancient prophet—or a demon that could enchant the human heart. Isabel’s grip loosened as if she were in a trance.
Clink.
The black elixir bottle fell to the floor with a dull thud. With trembling hands, she accepted the white vial Tusma offered.
“If I drink this… will I really… become stronger?”
“The choice is yours. But remember this. The moment you swallow my medicine, you will be freed—and at the same time, you will crave me.”
“…What strange confidence.”
Isabel hesitated for a moment. But she had no other options. Or rather, she could no longer feel that she did. Because she was already deep within the influence of Tusma’s Paint of Corruption. The corrupting pigment was rapidly spreading through her weakened heart, forcing her to trust his words with unnatural certainty.
Click.
She squeezed her eyes shut and gulped down the vial’s contents in one go. A sweet yet rich, utterly unfamiliar flavor. It wasn’t just liquid. It tasted like concentrated honey, fresh milk, and the essence of some nameless fruit all blended together.
Huh? It’s… delicious.
She didn’t realize even that thought was an effect of the Paint of Corruption. A warm, fulfilling energy—almost like drinking the very essence of life—spread throughout her entire body. Vitality surged back into limbs exhausted from all-night training. The heavy guilt that had crushed her heart melted away like snow.
And at the same time… a scorching heat began rising from deep within her lower abdomen. Like a tiny volcano preparing to erupt, molten lava-like heat started at her womb and raced through every blood vessel in her body. The body that had only ever burned from training was now igniting with an entirely different kind of fire.
“Ah…! Th-this…! What is this feeling?!”
Isabel’s face flushed with bewilderment. Her body was being overwhelmed by an unknown sensation her reason could not control. The space between her legs grew wet on its own. Every nerve in her body stood on end. She could vividly feel the slick nectar gushing from inside her slit, soaking the insides of her thighs.
The Tusma before her suddenly looked like an unbearably desirable male.
Kuh~! She’s taking it really well. That’s what my all-purpose semen can do. I can’t wait to see how that rock-hard body of hers collapses.
Tusma inwardly smirked with wicked amusement as he observed her changes.
“My body… it’s so hot…. This is wrong… You bastard, what the hell did you make me drink?!”
“That is exactly what your body has truly been craving, Isabel. It’s the sound of your long-suppressed instincts finally waking up.”
Tusma snatched the empty vial from her hand, tossed it aside, and pulled her body firmly into his arms.
“Hah…!”
A commoner was embracing her without permission, yet instead of disgust, her heart was pounding wildly. His solid muscles, broad chest, and above all… the massive, burning presence pressing hard against her lower belly. Isabel heard the final thread of her reason snap with a quiet pop inside her head.
“Me… do something to me… please…”
She whispered like a plea, instinctively clinging to his body. The steel knight was gone. Only a bitch in heat remained, desperately begging for a male’s mercy.
“Heh heh. As you wish.”
Tusma carried Isabel in his arms and stepped into the old armory tucked away in the corner of the training ground. The space reeked of cold metal, oil, and dust. It was the perfect stage to unleash their primal desires.
He shoved her against a cold weapon rack. The contrast between the icy metal against her back and the burning heat of Tusma pressing from the front amplified her pleasure to an extreme degree.
Slurp. Sluurp.
Tusma ravaged her lips with rough hunger. His tongue invaded without giving her a chance to resist, stirring wildly inside her mouth. Isabel could only moan breathlessly and accept his kiss.
“Y-you… how dare you… take my first kiss… mmmph!”
Isabel panted out the question, but her body was already responding to him perfectly. Tusma tore her sweat-soaked training uniform to shreds.
Riiip—!
Along with the sports bra that had been restraining her enormous E-cup breasts, her top was ripped to pieces. The suppressed, voluptuous mounds sprang free with elastic bounce, reveling in their liberation. The pale hidden skin that had always been wrapped in bandages and her large nipples, now stiff with arousal, gleamed sensually in the darkness.
“Kuh…! Incredible. You were hiding something like this?”
Tusma marveled as he grabbed one of her massive breasts. It was so large that even one hand couldn’t fully contain it. The unique texture—soft yet firm—filled his palm completely. He pinched and twisted the erect nipple between his thumb and forefinger, tormenting it.
“Haaahng! D-don’t touch me there…! That spot… ahhht!”
“You don’t like it? Then I’ll stop.”
When Tusma pretended to pull his hand away, Isabel frantically grabbed it.
“N-no…! I’m sorry! I was just testing you! Harder… much harder…! Crush them…!”
She begged with tears in her eyes. The more she touched him, the deeper she was being stained by the Paint of Corruption. Normal thoughts were no longer possible. All she could think about was mixing her body with Tusma’s.
“Heh heh.”
Tusma grinned and began kneading her entire breast with crushing force, just as she had begged. At the same time, his other hand yanked down both her training pants and boy shorts in one swift motion. Her healthy, bronze-toned ass and her already glistening secret pussy were exposed without defense. The puffy clit and the slit beneath it were clearly visible even in the dim light.
“Now, Isabel. I’ll give you the true ‘power’ you’ve been craving so badly.”
Tusma pulled out his massive cock and pressed it against the entrance of her dripping pussy. Isabel trembled with both pleasure and fear at the hot, hard sensation prying open her folds.
“Eh?! S-so this is what you meant by power…? Wait, pregnancy would be bad! I have to… protect Lady Elara…”
“Haha, how far ahead are you thinking? You perverted noble.”
In response to her words, Tusma briefly pulled his cock away. But it was a feint.
Schlick!!
“Haaang?!”
At the same time he withdrew his cock, he thrust his fingers deep into her pussy.
“Forget about that arrogant queen. From today onward, your master is me.”
His fingers stirred inside her narrow entrance, gently brushing against the virgin membrane that no one had ever touched. The thin, elastic feel of it transmitted vividly to his fingertips. He found the tiny opening in her hymen and softly scraped the sensitive inner walls beyond it.
“Hiiiiaaaang~!! N-no! Not there! It’s my first timeee!!”
A piercing scream tore from Isabel’s throat. Her body shook as if she might faint, swept away by the waves of her first orgasm. Clear female ejaculation gushed like a fountain from her urethra, soaking Tusma’s hand and her own thighs.
This was the moment the steel knight finally broke.
“Haha. You can’t collapse already. I haven’t even started yet.”
“Ah… aaaaa…”
Isabel’s pussy quivered as she stared at Tusma’s massive, towering manhood.