When Four Travel Together, One Must Be on Our Side

"Unnie Taeyeon isn't here? Or is she already inside?"

Im Yoon-ah stood at the door. The sound of water from the bathroom was like some bewitching spell, making her heartbeat race faster and faster.

Her fingertips unconsciously gripped the hem of her pajamas, bunching the silky fabric into a ball in her palm.

She lowered her head to look at her bare feet. Her pale toes curled slightly from nerves, leaving faint indentations in the carpet.

She didn't hear Taeyeon's voice, only the rushing sound of water.

The water suddenly grew louder, as though urging her on.

"This might be the best chance..." she whispered to herself, so softly it was almost inaudible.

Her trembling fingers undid the first button of her pajamas.

The silk slipped from her shoulders, gleaming like pearls beneath the warm yellow light.

When her pajamas fell onto the carpet, they made almost no sound, drifting down as lightly as a feather.

Now she stood in the middle of the room wearing only thin lace underwear.

The cold air from the air conditioner brushed over her skin, drawing a small shiver from her.

The mirror reflected her slender figure—her narrow waist, long pale legs, and collarbones flushed faintly red from nervousness.

She drew a deep breath and undid the clasp beneath.

The lace slid down the curves of her body, gathering at her feet like a soft flower.

Now she had completely let herself go. Moonlight leaked through the gap in the curtains, coating her in a silvery glow.

Steamy vapor spilled from the crack beneath the bathroom door, casting a hazy strip of light across the floor.

Im Yoon-ah raised her foot and took the first step.

The instant her sole touched the cold tile, she shrank back involuntarily.

The water suddenly stopped.

"Who is