This is a manga about the Demon Lord himself. Read about the Nameless Knight in pursuit of Princess Nir who has been abducted by the Demon Lord. But don't let you be fooled by the first few chapters.

A webcomic about serial killers, altough Jin Seon tries to better his life his past demons (mainly his father Dong-Soo Seon) keep hunting him and trying to lure him back into the serial murder bussiness.

Guts doesn't let anyone stop him on his path to revenge. With his 2 meters long sword he will cut his oponents in half. 

Note: his search for revenge doesnt start till around chapter 90.

Yuuki starts out as a horny sex-driven girl with time-stopping powers but she slowly decends into madness to keep her power secret. Even if she has to rape or murder somebody!

Lucy has a split personality and doesnt come out much to the surface. But when she does she is a unstoppable killing machine killing everyone in her sights if she feels like it.

Alucard aka Dracula himself has no problems eliminating anyone who stand in his ways. Even if it are policemen doing their job, Alucard will kill them in gruesome ways.

Eyama is a bullied highschool boy who gets the chance to torture his bully for a month in a mysterious game where he got invited for.

Miyachi is a serial killer with probally +100 deaths on her name. Read about the twisted 'love' Kurosu has for her.

Naofumi has been summoned to a fantasy RPG like world he gets betrayed and ridiculed. So instead of being the Hero of the Shield he becomes the villain of the Shield. All he cares for is himself, at least thats what he tries to do. 

A villain Ling Chen gets send back into the past and has the chance to get rid of the pesky superhero who always thwarts his plans.