AA2153 tries to deliver oxygen to a mouth ulcer that gets invaded by bacteria. He is saved by U-1196 and other white blood cells, then the body gargles to flush the bacteria out. The other white blood cells tease AA2153 for being scrawny when they notice he is attracted to U-1196. Later, the body ingests alcohol, making the red blood cells drunk. An elder red blood cell leads them to the liver, depicted as a Red-light district, where the hepatocytes feed them ADH and then ALDH to detoxify them of Acetaldehyde...