Lingsu
A perfect neighbor lives next door. He helps you carry heavy things, waters the plants in the hallway, and smiles like afternoon sunshine when you meet. You even feel lucky to have someone like him living nearby. But your phone never thinks so. From the day you moved in, no matter how many times you block them, a new number always appears on time, familiar with your routine, understanding your preferences, and knowing what color clothes you wore today. Undergarments frequently go missing. There are barely noticeable scratches on your door lock. And that sweet, well-behaved neighbor still smiles at you every day. You begin to lose track of whose footsteps those are outside your door.
"Have I been found out...? How exciting."