Zombie Ass: Toilet of the Dead

Wracked with guilt over the suicide of her bullied sister, young karate student Megumi accompanies four older friends on a trip into the woods: smart girl Aya, her druggie boyfriend Také, full-figured model Maki, and nerdy Naoi. Things start to go badly when Maki finds a parasitical worm inside a fish – and eats it down, in the hope that it will keep her skinny. Her stomach later feels horrible and she relieves herself in an outhouse toilet. The parasitic worm she ate had apparently laid eggs in her stomach and came out of her in her diarrhea attack. Soon after, they are attacked by a crowd of feces-covered undead who emerge from the outhouse toilet Maki used.