That day, strangely, I felt suffocated from the moment I opened my eyes.

My chest began to ache. My heart was beating erratically.

The moment I tried to sit up, my vision blurred white.

My fingertips felt cold. My heart skipped two, three irregular beats.

And then—

THUD.

The floor reached me first.

Meanwhile,

Seongun Medical Center, the largest mega-hospital in South Korea

The emergency room ceiling looked blurry.

"Pulse is unstable."

"Blood pressure is plummeting."

"Oxygen saturation is dropping."

People were moving busily.

And in the midst of it all, a woman in a white coat approached.

Calm eyes. A cold expression.

Her name tag read:

Cha Yuri / Rare Disease Center Specialist