Young Ko is on the verge of picking up a new hobby... Ko Higaonna, while sharing a moment with his not-quite-girlfriend Satomi, is disturbed to find a sallow-faced man observing him with infrared goggles from the shadows. Offended by this breach of privacy, Ko soon spills blood and takes possession of the goggles. However, the Voyeur persists, and Ko now becomes his pupil, set to uncover what lies beneath people's smiling faces... What happens in private, in the dark...?