Yu Yagami approaches her duties as a hospital nurse with complete dedication, always placing her patients’ needs ahead of everything else. On the night shift, her attentive care gradually shifts into more intense and personal forms of attention, pulling her deeper into an unrelenting cycle. With each passing encounter the boundaries of her role stretch further, leading her toward increasingly extreme methods of providing comfort. Over time, this pattern consumes her, drawing her steadily downward into uncharted depths of her profession.