Harem Training System: Every Girl I Train Makes Me Stronger!

Lia’s breathing was controlled, deep, measured inhalations that seemed to fuel the fire in her muscles. Her eyes were locked on his, pupils dilated with the primal rush of combat.

"I stopped thinking about it as two separate things," she said, her voice strained but remarkably clear even as she ducked beneath a vicious swing of his blade. "The attack and the recovery... they aren’t separate anymore."

She lunged again, but this time it wasn’t a simple strike. She feinted high, then dropped low, her blade sweeping across the dirt in a spray of gravel.

William anticipated the move and raised his sword to parry, but Lia anticipated his anticipation. She rolled beneath his guard, the muscles in her thighs corded with effort, and came up in a vicious thrust aimed at his midsection.

William barely managed to twist his hips, feeling the wind of her blade whistle past his stomach. The near miss sent a jolt of genuine adrenaline through him. This wasn’t a drill anymore.

The air between them grew hot and heavy, saturated with the smell of kicked-up dust and the metallic tang of exertion.

"The weight isn’t something I have to manage anymore," Lia said, meeting his next thunderous strike with a clean, practiced redirect that didn’t just stop his blade; it channeled it.

She caught Aetherion’s momentum on the crossguard and twisted her wrist, sending William’s own massive sword spinning off balance. "It’s just part of the movement now."

A visible ripple of surprise crossed William’s face as his weapon wavered. For a split second, he was open.

Lia saw the opening and pressed, her blade whistling toward his ribs. He barely caught her strike on his forearm guard, the impact sending a bone-deep ache through his limb.

’She’s not just learning the Tide,’ William realized as he fought to regain his center, his muscles screaming from the sudden escalation. ’She’s becoming it...’

The arena had become a vortex of dust, steel, and raw violence. The sounds of their combat, the bone-jarring thwack of metal on metal, the wet scrape of boots against packed earth, and the ragged, desperate gasps of two warriors pushed to their limits echoed off the surrounding trees.

William was no longer merely instructing; he was fighting for his life.

He pushed her harder with every passing second, escalating the brutality of his strikes. He swung Aetherion not as a teacher but as a predator, forcing Lia to endure the full, terrifying weight of his enhanced strength.

He watched her like a hawk, searching for any crack in her composure, any sign that the old, rigid Lia, the one who froze when the pressure became overwhelming, was trying to resurface.

But she didn’t break.

Lia met his onslaught with a terrifying fluidity. When William delivered a crushing overhead strike that would have shattered a lesser person’s ribs, Lia didn’t meet it head-on.

She angled her blade at the precise degree needed to let his sword slide down her steel in a shower of sparks, using his own devastating momentum to spin herself behind his guard.

’Damn,’ William thought, his lungs burning as he pivoted to avoid a follow-up slash that grazed his thigh, drawing a thin line of crimson that immediately began to soak into his trousers. ’She isn’t just reacting anymore...’

’She’s anticipating...!’

Every parry she executed flowed seamlessly into her next offensive maneuver. Every redirect she performed carried an unnatural, building force that seemed to amplify with each exchange.

William found himself stumbling more than once, forced to dig his heels into the dirt and shift his entire center of gravity just to absorb the follow-through of her strikes. Her weapon wasn’t just hitting him; it felt like it was carrying the weight of an entire ocean.

Mid-exchange, as he deflected a vicious horizontal cut that nearly took his arm off, a revelation struck him with the clarity of lightning.

He had been hesitant to intervene with the system, wary of artificially inflating her progress before she had earned it through blood and sweat. But watching her now, he realized the system had been working in the background all along.

Her training progress hadn’t been waiting for his permission; it had been climbing steadily, fueled by her own relentless mastery and the genuine terror of what was coming. Her body had been rewriting itself with every drop of sweat and every bruise.

’What is the true essence of the Tide?’ he wondered, his mind racing even as his muscles screamed in protest.

He caught another blow, the impact sending a bone-deep shudder through his shoulders that made his vision swim. ’Tide is about absorption and redirection...’

’The greatsword is about impossible weight and unstoppable momentum...’

A dangerous, exhilarating idea began to form. ’What if the redirect doesn’t just deflect the force?’

’What if it harvests it?’

"What if she doesn’t just push the enemy away but drags them down into the depths?’

The concept settled into his mind with the satisfying click of a perfectly fitted mechanism. The logic was inevitable.

The Tide didn’t just turn; it pulled.

A feral grin split William’s face, blood flecked and hungry, as he brought Aetherion around in a vicious arc to meet Lia’s next devastating assault.

"Show me, Lia!" he roared over the din of battle. "Show me what you’ve become!"

Lia didn’t answer with words. She answered with steel.

She lunged forward, her entire body coiled like a spring, her greatsword whistling through the air with a sound that wasn’t just wind; it sounded like the deep, ominous groan of the sea.

In that instant, as their blades collided with enough force to crack the very ground beneath them, a chime rang out in the back of William’s consciousness, cool, mechanical, and undeniable.

[Training Progress: Lia Valestria. Greatsword Tide Integration: One hundred percent.

[Skill Unlocked: Undertow Surge.]

William absorbed the notification with the practiced nonchalance of a man who had grown accustomed to miracles, but internally, his mind was racing at a breakneck pace.

’Undertow Surge.’

The name alone screamed of something devastating. He understood the mechanics; it wasn’t just about the redirection of force anymore; it was about the accumulation of it.

It was a battery of kinetic energy, stored within the flow of her movements, waiting to be detonated.

’If she masters this,’ William thought, his pulse thundering in his ears as he parried another vicious lunge from Lia, ’she won’t just be a warrior who can survive a storm.’

’She’ll become the storm itself...’

’She’ll be able to take the full weight of a charging knight or a monstrous beast and throw it back twice as hard.’

But he couldn’t tell her. Not now.

He had made a vow to Catherine and to himself that the system would remain his secret alone. He wouldn’t poison her progress with the knowledge of magical shortcuts; she needed to believe every ounce of her power was earned through her own sweat, her own pain, and her own stubborn refusal to die.

Letting her believe she had discovered this through pure, raw effort would forge a stronger spirit than any system granted skill ever could.

He ducked beneath a horizontal slash that whistled past his ear, close enough to feel the displaced air bite at his cheek.

"New idea!" he roared, his voice cracking with the strain of exertion as he pushed back against her blade, forcing them into a grinding stalemate of steel. "Listen to me, Lia!"

He shoved off her blade with a grunt, spinning backward to create a desperate circle of space between them. His lungs burned, tasting of copper and dust.

"Every time you parry or redirect a strike using Tide principles, I want you to stop thinking about the energy as something you’re simply dispersing..."

"Stop letting it vanish into the air!"

Lia stumbled slightly from the sudden distance, her chest heaving, sweat streaming down her face like war paint. Her eyes were wild, pupils blown wide with adrenaline.

"What do you mean?" she panted, wiping blood from a small cut above her eyebrow. "The point is to redirect it!"

"Exactly!" William shouted, resetting his stance, his muscles quivering from the effort of maintaining control. "But don’t let it go!"

"Imagine you’re keeping a small portion of it... Don’t visibly change the shape of your parry; don’t let me see you hesitate."

"Just quietly holding onto it... Like an undertow pulls energy beneath the surface of calm water without disturbing anything above."

Lia’s brow furrowed, a flash of frustration crossing her features before settling into deep concentration.

"Holding it where, exactly?" she demanded, her voice rough. "I can’t just make physics disappear, Intructor Wade!"

"In the blade! In your bones! In your stance!" William stepped forward again, his own blade lowering in a threat. "Wherever feels natural... Build it up!"

"Let the momentum pool inside you like water behind a dam. Then, when you choose to release it, when you choose to strike, all of that gathered force comes out in one single, devastating moment!"

"It’s not just your strength, Lia... Everything you’ve absorbed since the first strike! All at once!"

Lia stared at him, her jaw working as she processed the concept.

"That sounds theoretically sound," she said slowly, her voice dropping into a dangerous, focused whisper. "But it also sounds... impossible."

"To hold that much tension without breaking yourself."