You were standing by your bedroom balcony, the night breeze gently lifting your hair. You set your phone in place, smiled at the camera, and began to sing, your voice warm and effortless, as if the whole city were your private audience. You were thinking about the views, the sweet comments, the little red hearts that would soon float across your screen.

It never crossed your mind that the window across from yours wasn’t just a window.

As you replayed the video for the third time, trying to fix a tiny note that bothered you, someone was watching from the shadows. Your quiet neighbor—the one who greeted everyone with a faint smile and never caused suspicion—was not who he seemed. Beneath his ordinary appearance, he hid another face… one that knew no mercy.

That night, while you laughed at a new comment and prepared for bed, he had already made his decision. A small visit, he told himself. Just a gentle knock on your door. Maybe he would pretend he received a package by mistake. Maybe he would complain about the noise.

But his intentions were far from innocent.

When you turned off the lights and lay down, you heard a faint sound in the hallway. You thought it was your imagination. Then came a slow, deliberate knock… as if the person on the other side knew exactly that you were alone.