Yoon Serin had always believed she was invisible.
Not in the sad, lonely kind of way.
In the invincible kind.
People noticed her face, her charm, her ugh.
But not her.
Not the quiet cold under her skin. Not the joy that surged through her veins when someone stopped breathing.
But recently…
She could feel it.
Someone was watching.
***
It started three days ago.
A shadow behind her in the campus hallway. A reflection two steps behind in the subway gss.
She'd turn... no one there.
But the feeling lingered.
She tested it the next night by taking a detour through a nearly empty street.
She paused at a corner.
Counted.
One… two… three…
Nothing.
But on four...
A faint scuff of leather soles behind her.
She smiled.
"So the game begins.”
***
Meanwhile, Han Sihun stood still on the rooftop of a parking garage across the street, camera lens zoomed in on her form under the streetlight.
She was too calm.
Too graceful for someone just out for a walk at 11 PM.
But that wasn't what unsettled him.
It was the way she stopped.
Tilted her head.
And smiled up at him.
Even though she shouldn't have been able to see him.
***
She vanished after that.
Not in the literal sense. Serin still went to css, smiled at professors, donated to an animal shelter. She even volunteered for blood drives.
But every time he tried to follow…
She’d disappear.
Like smoke slipping through fingers.
***
Back in his office, Sihun stared at the board he’d pinned on his wall.
Photos. Victims. Red strings.
At the center: Yoon Serin.
No solid proof. Not yet. But everything screamed her.
And still…
“Why do I want to see her again?”
He hated criminals. Detested killers.
But when he saw her smile...
He didn’t feel anger.
He felt…
Curiosity.
Hunger.
Fascination.
***
Across town, Serin stood in her room, brushing her hair in front of a mirror.
She didn’t look up when she said softly,
“You’re getting bolder, Mr. Pathologist.”
She smiled to herself.
“Let’s see how long you can follow me before you break.”
