Kouhei thrust his hips forward with a slow, deliberate force, and his cock pushed past the entrance of Yuuna's soaking wet pussy, spreading her velvet-soft walls apart inch by inch. The moment he entered her fully, he bottomed out deep inside, his thick shaft burying itself into her tight, eager hole without resistance, thanks to how soaked she already was.
A sudden, drawn-out moan slipped from her lips.
Her voice trembled as pleasure surged through her, unable to contain the cry that escaped instinctively.
"T-That was quite loud, wasn't it?" Yuuna whispered, cheeks flushed, embarrassment and arousal battling on her face.
"Yes…" Kouhei nodded, eyes locked onto her expression. "Try to hold back your moans as much as possible. Yuka-nee-chan might hear us."
"O-Okay... I'll try."
Determined, Yuuna brought both hands up and clamped them tightly over her mouth, pressing her palms against her lips.
Kouhei gripped her hips firmly, his fingers sinking into the supple flesh as he began to thrust, slow and steady at first, dragging his cock along her slippery insides with agonizing precision.
"Mmm, mmm, mmm... Mmmm..."
Her muffled whimpers and suppressed moans escaped through clenched fingers as she clenched around him. Her pussy, already slick with arousal, wrapped tightly around his cock with every movement, as if trying to keep him buried inside.
But even though she fought to stay quiet, Yuuna quickly realized the challenge was insurmountable. Kouhei wasn't thrusting at random, he was aiming and targeting. He repeatedly slammed against the most sensitive point inside her, her g-spot, with ruthless accuracy.
"Mnnn, mmm.... Mnnnn~!"
She bit into the edge of her hand, desperate to keep the sounds in, but it was getting harder with each thrust. Kouhei was relentless. He was clearly doing this on purpose.
Kouhei was, at his core, a sadist.
The situation was thrilling for him. Forcing her into silence while pushing her to the edge of pleasure was like an erotic game, and her suppressed reactions only intensified his desire. His calculated thrusts into her g-spot weren't just for her pleasure... they were a challenge.
He was pushing her to break.
"Mnnn, mmm... Mnnnn~... Mmm...!"
Yuuna, too, was a sadist at heart, but being on the receiving end , fighting against the rising urge to moan, trembling from the overwhelming sensations... she was starting to crumble.
Their relationship had always been a contest. A silent war for dominance and for control. Every encounter between them was a battle to determine who would come out on top and who would submit.
Right now, Kouhei was taking the lead.
"Mnnn, mmm...~! Mmmmm...!"
With every thrust that slammed against her cervix, Yuuna's body reacted involuntarily. Her eyes began to roll back, unfocused, as drool trailed from the corners of her parted lips. Her body was shaking, completely overwhelmed by the pleasure he was pouring into her.
Her brain felt like it was drowning in dopamine, with each thrust sent a new wave crashing through her senses, numbing her thoughts, twisting her mind into delirium.
She was getting close. Too close, in fact.
If he didn't stop, she would cum.
But Kouhei didn't stop. He kept thrusting.
Her cervix, already tender from his continuous assault, twitched with each slam of his cock. Her pussy clamped down tightly, squeezing along his entire length as though it was trying to milk him, trying to pull him even deeper.
"Mnnn, mmm... Mm... Mmnnnn!!!"
Yuuna's toes curled tightly, her back arching on instinct as the waves of pleasure washed over her. Her body moved on its own, trying to find some escape from the overwhelming sensation, but Kouhei held her hips down firmly, refusing to let her squirm away.
His gaze locked onto her trembling form... Her pleasured face, her flushed skin, her trembling fingers pressed against her lips, and he felt it.
Complete and utter domination.
His cock throbbed inside her. He was nearing the edge.
"Mnnnn~... Mmmm...! Mnnn...!"
Yuuna was on the brink too. Her body screamed for release. Her muscles tensed, and her pussy throbbed uncontrollably.
But she didn't want to lose.
If she climaxed first, the victory would go to him. She would fall beneath him in their silent war for dominance.
She couldn't let that happen.
Without a word, she wrapped her legs tightly around his waist, locking her ankles behind him. Then, with focused control, she clenched her inner walls hard, squeezing his cock with everything she had.
"Kuh...! Y-Yuuna-san, you're tightening too much!"
"Mmnnn...! Mmm! Mmmnnnn! Mmmm!"
Even with her sudden counterattack, Kouhei didn't falter. He thrust forward with renewed force, refusing to back down. The rhythm grew faster and more intense.
And then—at the peak of their battle—their eyes met, glowing with a radiant light. Their entire bodies followed, shimmering with a bright aura that grew stronger with every heartbeat.
In that exact moment—
Kouhei's hands gripped her hips tighter, and with a final, powerful thrust, he drove himself deep inside. His cock twitched violently, and he released, flooding her womb with a thick, hot torrent of semen.
"Mnnnnnnnnnnnnnnnnnnnnnn~!!!"
Yuuna screamed into her palms, her body locking up as her orgasm exploded through her. Her pussy pulsed, clenching and milking his cock as she came hard, at the same time as him.
They had achieved a Love Link.
As the last pulses of light coursed through them, their bodies trembled, still locked together. They gasped for breath, staring into each other's glowing eyes. Slowly, the light faded, leaving behind only the heat of their bodies, the slick joining of their sweat and fluids, and the satisfaction of mutual climax.
Their lips met again, a heated kiss blossoming between them.
Each exhale mixed with the other's, warm puffs of air passing back and forth as they panted right into each other's mouths. Their bodies, still connected in the most intimate way, trembled slightly from the fading waves of pleasure.
Eventually, they parted, foreheads grazing as they caught their breath. A faint glimmer appeared on Yuuna's lips. It curved in a smile both sweet and knowing.
"Yuuna-san? What is it?" Kouhei asked softly, eyes narrowing with curiosity at her amused expression.
"It's nothing," she said with a chuckle that hummed low in her throat. "It's just that… it amazes me how much you've changed. It hasn't even been a full year, yet you're nothing like the person you used to be. You're so... different now."
"Really?" Kouhei blinked, tilting his head slightly.
Now that she brought it up, Yukari had mentioned something similar not too long ago. At the time, he hadn't given it much thought. He didn't feel like he had changed at all. But… maybe they were both seeing something in him that he couldn't.
"And you're becoming much more of a sadist," she added, her voice laced with amusement. "Just a moment ago, you were completely set on dominating me, weren't you?"
"Uh... it's not that..." Kouhei replied, scratching the back of his head as doubt crept into his mind. Was I really trying to dominate her like that?
"You don't even realize it, do you?" Yuuna teased with a sly grin. "But you are, Kouhei-kun. You're a sadist—more of a sadist than I am, I think."
She said it with a glint of approval in her eyes, and from the way she looked at him, full of quiet mischief and pride, maybe she wasn't wrong.
"Nagisa might actually be a good catch for you, Kouhei-kun."
"Nagisa-san?" he echoed, puzzled.
"Yes. She's a masochist," Yuuna revealed casually, her tone light yet full of implication. "Why not give her a proper S&M sex session next time in the Love Link Container? Oh, and Misuzu... she's an exhibitionist, too. Fufufu… sorry for spoiling the surprise, Kouhei-kun. I'm sure you would've liked to discover those on your own, wouldn't you?"
"I kinda already figured Misuzu-san is an exhibitionist…" he muttered.
"You're right… fufufu… doing it in a train on your first time, that's pretty wild," Yuuna laughed.
It was wild, no doubt about it. Reckless, bold, and completely unforgettable. But it had also been incredible.
"But well… you probably already know this, Kouhei-kun," she continued, her tone softening just a touch, "I'm a sadist too. I enjoy watching people struggle. Well, not because I like to hurt them, but because there's something… satisfying about seeing someone trying their hardest while being pushed to their limits. That feeling gets especially intense with you, Kouhei-kun. Maybe it's because I love you?"
Without warning, her pussy tightened around his dick again, an involuntary clench that rippled along his shaft. His cock twitched, and the last remnants of semen still lingering inside his urethra were sucked out, as if her body refused to let even a drop go to waste.
"Why don't we move on to round two?" she whispered, leaning closer. "With me on top this time?"
A confident smile lit up her face as she added, "That way, I can control the pace… and manage my moans better while I'm the one moving."
And just like that, their bodies shifted. With Yuuna taking the lead, round two began.