Highschool of the Dead/Nightmare Fuel

Of course, being a series about zombies, it was inevitable.

• Any scene involving fanservice on a victim being attacked/eaten by "them". If not by "them".
• Just about any scene exposing the darker nature of humanity.
  • Some examples can hit home a bit too hard, depending on a person's experiences. For example, if you ever experienced even mild Blood Knight tendencies, then Saeko Busijima is more than enough to scare you if you fear becoming a Sociopathic Hero even a little.
• The first zombie that approaches Takashi and Rei opens his mouth a bit wider than a normal human mouth should open, showing More Teeth Than the Osmond Family and some drool.
• Literally ever single scene involving Shidou's "cult". Shidou himself proved himself a horrifying Complete Monster from the getgo, but look at his "subjects". The first one we see (the one with the phone) is clearly on the last vestiges of sanity, and the others are essentially little more than wild eyed, slobbering sex slaves. Perhaps the worst part is that they were all once normal highschool students, but thanks to the depravity and megalomania of a single man...
  • Then finding out in a recent chapter that he is STILL ALIVE.