Outgrowing only girls, Overtake boys, Growth sound. Captured Girl Arc

In a secret facility ruled by a sinister organization, only girls respond to the mysterious “growth sound.”
Captured during an infiltration mission, the girl should have weakened under confinement—yet her body reacts in the opposite way. Heat swells within her, energy gathers in her limbs, and each day she awakens taller, stronger, and increasingly impossible to restrain.

The tighter they bind her, the more violently she grows.
The more they try to break her, the more her body hardens and expands.

What begins as a simple imprisonment turns into a terrifying reversal of power.
Her captors—once towering over her—gradually shrink beneath her gaze, until the giant girl, now uncuttable by blades and unstoppable by force, claims the dungeon as her domain.

A dense, fetish-focused captivity-growth story packed with “imprisonment,” “reversal,” “body expansion,” and “female domination.”

Chapter 1 – Infiltration, and the Trap
She slips into the enemy base, confident in her mission—only to be ensnared by a simple trap. At first, it seems like ordinary captivity, but a strange heat pulses in her body, accompanied by a faint “growth sound.” Something inside her has begun to awaken.

Chapter 2 – Early Growth Inside the Chains
Days pass, yet she shows no sign of weakening. Instead, her legs grow warm, her chest tingles, and each morning her feet rest closer to the ground. The guards sense something is off but dismiss it. She, however, feels it clearly: she is getting taller.

Chapter 3 – Mid Growth, Shifting Power
Her viewpoint rises day by day. Even when several guards pin her down, a strange confidence fills her—she feels she could break free with ease. Their eyes drift lower, their grip weakens, and the shift from “guarding” to “looking up at” becomes undeniable.

Chapter 4 – Giant Physique, Weapons Become Meaningless
Shackles feel lighter, and not even blades can scratch her increasingly firm skin. Panic spreads among the guards. They try to suppress her growth, but each struggle only intensifies the “growth sound,” swelling her height and strengthening her luminous, expanding body.

Chapter 5 – Power Reversal, From Being Carried to Commanding
Now towering over 200cm, her chest well above the guards’ eye level, she commands them to carry her to their boss. They can barely lift her, yet submit. When she bends her knees to “make it easier for them,” they finally realize the truth: the power dynamic has fully reversed.

Chapter 6 – The Collapse of the Guards
Even four guards pushing together can only grab her massive thighs. She gently lifts one leg—and sends them stumbling. Fleeing is useless; she catches them effortlessly. The differences in height, power, and presence grow mercilessly. They are no longer captors—just toys.

Chapter 7 – Final Growth, The 250cm Enchanted Captive
A spear strike does nothing. Her skin, now impossibly smooth and firm, endures every attack. They cannot even reach her chest anymore. A light shove from her is enough to topple them.
In truth, the cell now imprisons only the guards. As the “growth sound” echoes through the room, she rises to 250cm—claiming her place as the new ruler of the dungeon.