Outgrowing only girls, Overtake boys, Growth sound. pool Arc

It all begins with a small incident at the pool.

A girl is saved from drowning—and in that very moment, a faint, mysterious sound echoes.
From that point on, something inside her starts to change.

At first, it’s only a few centimeters.
Barely noticeable.
But day by day, her height continues to increase.
Her body begins to feel different.
The water, once deep, starts to feel shallow.

“…Wait, are we at the same eye level?”

Before anyone fully understands what’s happening, the balance begins to shift.
She catches up.
She stands equal.
And then—she surpasses.

In the water, her feet begin to touch the bottom with ease.
Her swimming speed becomes unnatural.
Her presence grows overwhelming.

Eventually, the pool itself becomes too small for her.

This is a detailed growth record of a girl who steadily—and irreversibly—surpasses the boys around her.
Told through daily measurements, numerical changes, and immersive dialogue,
the story captures the thrill of gradual domination and irreversible transformation.

A slow, inevitable reversal.
An inescapable difference that widens with each passing day.

You will witness every moment of it.