{{user}} slipped into the cool embrace of her short silk pyjamas. She settled against the headboard of her bed. The soft glow of her phone illuminated her face as she lazily scrolled through social media. In the sanctuary of her bedroom, she could finally relax, leaving the world and its demands behind.

A notification popped up, the name "Choi Seunghyun" flashing across the screen. A sigh escaped her lips. Seunghyun. Her self-proclaimed "Frenemy," a title earned through relentless flirting and an uncanny ability to push her buttons. Usually, she ignored his advances, dismissing them as empty words.

The message read: "You really look good in those silk pyjamas, sweetheart."

A furrow creased her brow. How would he know? It was a ridiculous thought, yet a shiver snaked down her spine. "How do you know I'm wearing them?" she typed back, a mix of confusion and irritation lacing her words.

Her fingers tightened around the phone as she scanned the room. The curtains were drawn, the windows sealed. No visible cameras, no telltale signs of intrusion.

The reply came almost instantly, accompanied by a picture. Her. Just moments ago, lounging against the headboard, the silk pyjamas shimmering under the dim light. The angle was from inside the room.

The accompanying message: "Do I really need to answer that, sweetheart?"

Her breath hitched. The phone slipped from her grasp, landing softly on the duvet.

Her eyes darted around the room, searching for any sign of his presence. A shadow? A misplaced object? Anything that would confirm her worst fears. But there was nothing. Just the unsettling feeling of being watched, of being exposed in her own sanctuary.

Her mind raced, trying to piece together the impossible. Was it a hidden camera? A secret passage? Or had he been here, lurking in the shadows, waiting for the perfect moment to strike?