The Twin Teachers' Submission II (Illien & Idrien Ksakru) (6)
Idrien’s entire body trembled as Marei’s fingers stirred deep inside her. She didn’t even seem to realize that her hips were slowly drawing circles around the young student’s hand, greedily swallowing it.
The image of her beloved, proud older sister barking like a dog and panting like a bitch flashed before her eyes.
“W-what if… I… I take her place instead…? Then… will you stop?”
“Hmm… Sure, why not. I’d actually rather play with the sharp, icy Idrien than with soft, round Ren anyway…”
A laugh almost burst from her throat at how absurd it was. When she thought about her sister’s devoted, perverted behavior, it was obvious how much she adored—no, loved—Marei. Even Idrien, who had barely spoken properly with her sister for years, could see it clearly. Yet the boy who called her his lover answered as if he were simply relieving some sexual urge. The realization made her teeth ache with both fury and envy.
That he could so easily accept such an outrageous offer made Idrien bite down on her lip until she tasted blood. For a moment she even considered killing Marei to end it all, but she couldn’t bring herself to do it.
For my sister. For my sister.
The thought repeated endlessly, binding her hands. An obsessive devotion that no ordinary person could ever understand swirled inside her head.
“Then… swear it… on the World Tree… I’ll do it too, so…”
Idrien slowly reached out toward Marei. There were many ways to trick her into making the oath while she mistakenly believed the relationship between her and Illien was merely that of lovers. She already knew from Illien that the World Tree’s oath was incredibly vague and open to countless interpretations. A promise to end the lover relationship could be twisted depending on the definition of “lover.” Since their actual bond was that of master and pet rather than ordinary lovers, Marei’s oath would mean almost nothing. In the end, Idrien’s proposal was no different from swearing to become a willing bitch who served him of her own accord.
“Uuuu……”
A hot sigh escaped her lips. Idrien, who had been leaning against the wall, now found herself bent over the desk. At Marei’s command, she had stripped off her skirt, stockings, and panties. Her naked body shivered violently.
Slender waist, enormous breasts, and full hips. Behind that impossibly perfect female figure stood a boy teetering on the boundary between child and adolescent, pressing himself tightly against her.
“Nngh…!”
Marei pressed his hips flush against her and slowly pushed his fully erect cock between the plump cheeks of her ass. It was so rigid that comparing it to the burning heat and softness of her aroused body felt pointless. The realization that the one clinging to her from behind was a mere student faded into darkness; all she could feel was the overwhelming presence of a complete male. Fear made her body twist little by little.
His arms were still a little too short to reach her chest properly, so Marei gave her waist a few light smacks, demanding she press herself closer. Idrien swallowed hard and slowly lifted her hips toward him. His hands began kneading her massive breasts—too large for even one of his small palms to fully grasp—like dough.
“Haaah…! Hnnngh…!”
Idrien clenched her teeth tightly, afraid a weak scream might slip out. Those small palms relentlessly squeezed and tormented her enormous breasts. Whether it was her own sweat or his, the moisture filling the space between them made their skin stick together obscenely, kneading her chest as if they were one single entity.
“Put some strength into your waist. You keep trying to collapse.”
Instead of answering Marei’s complaint, Idrien simply closed her mouth and squeezed her eyes shut. Her lower body, which was supposed to be supporting her, shook wildly from the pleasure, looking as though it might give out at any moment. The heat of the thick shaft lodged between her full-moon-like ass cheeks made her unconsciously rub her thighs together.
Schlick… schlick…
A faint, wet sound rose from between her rubbing thighs. It was so quiet that Marei, who was busy enjoying her body, probably couldn’t hear it. But to Idrien’s elven ears, it rang out like the deafening proof of her own lust.
It was humiliating.
Idrien swallowed dryly and carefully stole glances at Marei’s face. When she realized he hadn’t noticed, her breathing grew even rougher. She told herself she had to stop, yet her thighs continued to slide against each other, producing more and more lewd noises.
Schlick… schlick…
Unlike when she had half-lost her mind while masturbating earlier, her reason was now working at full capacity. Even so, her body moved on its own, unable to resist the desire. Her heart felt like it would explode. The rough breathing, the pounding heartbeat, the lewd motion of her thighs—she moved purely on instinct, terrified that Marei would notice.
Of course, Marei had noticed every single change in her.
He let out a small chuckle so quiet that the anxious Idrien couldn’t hear it, then pulled his cock—now glistening with thick white precum—out from between her ass cheeks.
“Look at me, Idrien.”
He no longer even called her “teacher.” Idrien slowly turned her body toward the boy who was much smaller than her. Her legs trembled so badly from shame and pleasure that she had to sit on the edge of the desk to keep from collapsing.
“You’re beautiful… And take your hands away.”
At Marei’s drawn-out words, Idrien squeezed her eyes shut and reluctantly removed her hands from her pussy and breasts. A sticky gaze crawled all over her body. The shame of showing this sight to a student the same age as those she taught made her unable to even open her eyes properly.
“Why are you so embarrassed? Didn’t I help you masturbate earlier?”
Idrien bit her lip hard. Insane. No—he’s still insane. She could only swallow the self-mocking words. The guilt and twisted affection she felt toward her sister had long since torn her apart inside. Time hadn’t healed the wounds; it had only let them fester and rot.
“Hurry…”
Idrien was shaking as if terrified. Fear and shame tickled every inch of her skin. The way her lower body, still soaked from earlier excitement, grew even wetter made her shudder with disgust.
“Hmm… You’ve got quite a bush, just like Ren. The rest of you is completely smooth, though.”
Marei’s hand slid down her smooth belly. Her slender fingers gripping the edge of the desk tightened so hard that her wrists bent sharply. The way his fingers traced patterns around her navel made her body slowly curl forward. The more honestly her body reacted to the pleasure, the tighter Idrien squeezed her eyes shut. She simply prayed for this moment to pass as quickly as possible.
“It’s cute how your thighs are quivering. Spread them a little more.”
If the pleasure hits me hard enough, maybe this moment will end quickly.
Following Marei’s order, Idrien pushed her hips forward and spread her thighs wider. Around her faintly trembling petals, long strands of honey stretched down, broke, and dripped onto the floor.
While Idrien desperately wished for the moment to disappear, Marei seemed determined to savor it for a very long time. He continued making demand after demand without pause.
“Open your pussy too so I can see it clearly.”
Marei sat in the chair, thoroughly enjoying the sight of the female teacher on his desk obeying his every command. Watching her tremble with shame while dripping sticky nectar, he leaned in close and blew a short puff of air across her exposed folds.
“Khh…!”
The spiderweb-like strands of fluid stretching across her spread pussy all snapped from the breath and clung wetly to her pink flesh. This was nothing like being swept along by the atmosphere or pushed by her sister’s seductive whispers.
“Does it feel good? You’re dripping even more now.”
Idrien turned her head away, her face burning crimson with humiliation. Her trembling lips, fluttering eyelids, and long ears clearly showed just how embarrassed she was. Marei grabbed one of her breasts roughly, demanding an answer.
“You have to reply, don’t you?”
“…Yes. It feels good.”
At Idrien’s honest answer, Marei smiled with clear delight. She couldn’t see his expression with her eyes closed, but it was a purely joyful smile.
“Idrien, you’re my slave now, right?”
“Yes.”
She had tried to answer stiffly, but her voice trembled from her increasingly heated body. At the sound of Marei’s pleased laughter, Idrien squeezed her eyes shut so tightly that wrinkles formed on her forehead.
“Now, say it again. The World Tree’s oath.”
At Marei’s demand, Idrien tried to keep her mouth clamped shut, but her body moved on its own and spoke the words he wanted.
“I… I am Master Marei’s meat toilet. I will not do anything that harms my Master, and I exist to drain his lust whenever he desires. If Master resolves all his sexual needs with me, he has promised to end his relationship with my sister as lovers…”
If Idrien offers her body for Marei, he will end the lover relationship.
In a way, it might have seemed like a reasonable promise. But it was full of loopholes. The oath Idrien had forced while barely holding onto her sanity in the waves of pleasure had clear weaknesses. Since they were already master and pet rather than lovers, the words barely mattered. Moreover, one reason the World Tree’s oath was rarely used was that distorted interpretations of vague statements were permitted. Though it was an ancient and seldom-used vow, one was supposed to eliminate all ambiguity and narrow the scope comprehensively. Idrien’s mistake had come from being too confident in her rational analysis of Illien and Marei’s relationship.
She wanted to clamp her mouth shut at the unbelievable words that had come from her own lips, but Marei’s command made her body continue speaking against her will.
“As long as the promise is kept, I will serve Master for the rest of my life by his side and fulfill my duty as a meat toilet. If Master fails to keep the promise, the World Tree’s curse shall fall upon him…”
“Good. Then, for now, masturbate for me.”
After all, Marei was already keeping the promise. He could have called Illien right now and enjoyed both sisters together without issue. But he was far more interested in toying with this shame-ridden body, in breaking the woman who writhed in pleasure yet clearly hated it. He had simply decided to pamper Illien only at home from now on.
Idrien’s hand trembled as it moved toward her lower belly. Watching this incredibly attractive older woman shake with shame before him, Marei grabbed the hand approaching her pussy and shook his head.
“Ah, I suddenly feel like cumming once first.”
Marei hooked his arm under the back of Idrien’s knee and slowly lifted it. Even though it should have been difficult for a boy to lift an adult woman’s leg, he did so effortlessly and rested it on his shoulder.
“Are you happy that I’m using you instead of your sister?”
“N-no… I’m not…”
“Even though you’re this soaking wet…?”
Squelch.
Marei pushed his finger deep into the drenched platinum-colored forest. With an obscene wet sound, Idrien’s body lurched forward before slowly returning to position.
“Haaah…! That’s… just because I’m excited…”
“Do you want it?”
Idrien took a deep breath, exhaled everything that had filled her belly, and finally opened her green eyes again. Staring at Marei with unfocused eyes, she slowly nodded.
“Then beg for it. Like a meat toilet. Just like your sister.”
“……M-Master. Please fill this meat toilet that has never been used before… with your thick semen. Khk…!”
“So that’s how you saw Ren, Idrien?”
Idrien bit her lip so hard it nearly bled. Her pink inner folds were spread wide open in this humiliating position as she stared at Marei’s enormous cock rubbing against her pussy. Yesterday she had only seen it while watching her sister; before that, she had hurriedly looked away in shame. Only now did she truly register its terrifying size.
“Why? Do you want me to put it in? Are you excited?”
“I-I don’t think it will fit…”
Marei held his cock with one hand and gently rubbed it around Idrien’s entrance. The sticky fluid that had soaked her pubic hair slowly coated his glans.
“Ren said the same thing at first—that it was too tight and painful. But after I fucked her all day, she fits my size perfectly now and squeezes me so tightly. Since you’re going to be the next meat toilet after Ren, I’m sure you’ll do well too.”
Marei spoke with a smile, casually uttering the most obscene words while his hands naturally caressed her body. Idrien’s face turned bright red.
“Are you excited?”
Idrien hung her head deeply.