Ana Satsujin, Dead Tube Recommendations
Both mangas are about a dangerous female who involve a male in her murderous plan while forming a relationship with get other. They have a similar plot just executed differently, Dead Tube is about murdering people to put it up online to get views, while get sexual pleasure from it and Ana Satsujin about a serial killer and a masochists forming a relationship out of fear and death while committing murders.
They both center around a really psychopathic girl and her relationship with a more shy boy. Even though Dead Tube is more graphic than Ana Satsujin, they are both great horror and thriller manga.
Both are horror manga, with a male who's nothing special, and a female who's a murderer. We follow them committing all sorts of crimes, and both have quite a lot of blood.
They both have similarities in terms of stories, namely murder, besides that the two manga also have psychopathic heroines, and there are few romantic spices.