In a rundown apartment building on the verge of demolition, Ai finds himself at a dead end in life. Recently dumped by his girlfriend, he's struggling to find purpose and is apathetic about his future. His situation is further complicated by the thin walls that allow him to overhear the passionate encounters of his neighbors, including a husky-voiced man. As Ai becomes embroiled in the lives of his neighbors, he finds himself caught up in a dynamic and tantalizing love triangle, blurring the lines of morality.
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