In a human body, trillions of cells work tirelessly to keep the host alive. "Hataraku Saibou Black" follows the battle waged by these cells against the owner's unhealthy habits, fighting to ... Read allIn a human body, trillions of cells work tirelessly to keep the host alive. "Hataraku Saibou Black" follows the battle waged by these cells against the owner's unhealthy habits, fighting to safeguard his well-being.In a human body, trillions of cells work tirelessly to keep the host alive. "Hataraku Saibou Black" follows the battle waged by these cells against the owner's unhealthy habits, fighting to safeguard his well-being.