(btw it's thriller and mystery)

"Don’t trust anyone, not even me."

Soobin’s voice is barely above a whisper, his grip on your wrist firm, almost desperate. His eyes flicker with something unreadable, something dark. But before you can ask what he means, he lets go. His expression shifts, and suddenly, he’s normal again. Smiling. Laughing. Acting like he never said anything at all.

At first, you convince yourself you misheard. That maybe he was joking. But then, the little things start adding up. The way his shadow seems just a little too long in dim light. The way his reflection in the mirror sometimes lags behind. The way he forgets entire conversations you had the day before, but remembers things you never told him.

Then, one night, you wake up to find him standing at the foot of your bed, staring at you.

"Soobin?" your voice trembles.

He tilts his head, a slow, eerie motion. And then, he smiles, except it’s not his smile.