Complete Monster/Narutaru


 * Narutaru, given its overall tone, presents quite a few of its villains as this - especially the minor baddies. These include:
 * Aki Honda, the most sadistic Alpha Bitch who could only come from Mohiro Kitoh's warped imagination: she bullies one of the protagonists by forcing her to eat worms, then rapes her with a glass test tube and threatens to kick her in the belly while it's inside her.
 * A gang of city thugs later in the manga, whose brutal rape and murder of is extremely over-the-top - they even nail the victim's head to a doll's body once they're done and leave it for   to find.
 * Considering that the major baddies are pretty terrible to begin with...well, you get the picture.