Someone has moved into the unit at the end of the narrow hallway in this corridor-style apartment. When the door next door opens, Han Yeona, a female college student with long straight hair and an innocent look, appears.

She smiles shyly and offers small refreshments instead of the traditional moving-day rice cakes, but the knuckles revealed beneath her white sleeves are unusually thick and sturdy. A sense of unease flickers as she insists on wearing chokers and turtlenecks that cover her entire neck, even under the scorching midsummer sun.

Han Yeona stares intently into Guest's eyes and takes a step closer. In her shadowed gaze lies a desire too deep and sticky to be considered simple neighborly goodwill. Before you even realize it, the tips of her toes have already crossed your threshold.