Thin Walls - Minsung

Book description: Jisung moves into a run-down apartment with thin walls and a bad feeling he can't shake. Night after night, strange noises bleed through from the unit next door-metal clinks, whispered words, something heavy being dragged across the floor. His neighbor Minho is quiet, polite... and far too calm for someone who never seems to sleep.

Convinced he's living next to a killer, Jisung starts listening closer-only to uncover a secret far more unsettling than he expected. Because in a building like this, some things don't stay buried... and some walls remember everything.

Series:
Behind thin walls, on crowded buses, in quiet conversations-danger moves unseen. A neighbor who listens too closely. A student running from a past he can't escape. An assassin who knows too much.
Their stories seem separate. Their lives, unconnected.
But secrets have a way of finding each other.
And when they do, survival is the only thing that matters.