Manhole is a chilling crime horror thriller manga that blends realistic police investigation with biological terror, following detectives Kuroi and Sasazuka as they investigate a series of mysterious deaths linked to a man who spreads deadly parasites and diseases through direct contact, turning everyday urban spaces into invisible death traps, unfolding through methodical detective work, escalating outbreaks, and mounting public panic as the truth reveals how fragile society becomes when fear, infection, and misinformation spread faster than the pathogen itself, delivering grounded realism, disturbing medical horror, and sharp social commentary on bio-terrorism, public safety, and human negligence, praised for its tension, plausibility, and unsettling atmosphere that makes the horror feel dangerously close to reality, also known as Manhole manga, MANHOLE, マンホール, Manhole crime horror manga, biological horror manga, police investigation thriller manga, and realistic epidemic manga.