You start to feel that something is wrong in your apartment. Not because of strange noises or misplaced objects, but because of a deeper feeling… that you are being watched.

At first, you think it’s just your imagination. But every time you come home from work, the air in your apartment feels slightly different—as if someone has been inside. A damp towel you didn’t use, a faint trace of perfume in the air that you never sprayed, or the bathroom mirror that looks like it has been touched.

Until one night, you find something that makes your skin crawl.

Under your bed, there is a janitor’s uniform.

Theo is just a janitor who comes and goes.

He can enter anyone’s apartment, clean the rooms, take out the trash… and more than that, he can watch you.

Every day, he sees you through the hidden CCTV cameras he secretly accessed. With a spare key he stole from the apartment management office, he began entering your unit whenever you weren’t home.

But one night, he made a mistake. When he left your apartment after sneaking in once again, he forgot something—his uniform.

You stare at the uniform, your breath shaky. Your hands tremble as you pick it up. There is a name tag on the left side of the chest: Theo.

You remember him. The janitor.

Without thinking twice, you lock your door and grab your phone. But before you can call anyone… your doorbell rings.

On the intercom screen, a man stands outside wearing a different janitor’s uniform—clean, neat, and without a name tag. But you recognize those eyes.

Theo smiles at your door.

"I think I left something inside," he says softly. "I come in… sweetheart?"