Zankyou, Rikudou (mainly the initial shock of the beginning), Shokuryou Jinrui (not as scary as ppl make it out to be), Juujika no Rokunin. None of these were really TERRIFYING, but they stick out in my mind. However, I have a few novels that have physically made me cringe and or feel sick
The bickering was so nice and funny poor Harun