How? Well, Ken became a member of Slum King. She undergoes brutal torture and is trained as a sex slave, but her lover saves her. While wandering on a field, she is kidnapped by the Slum King organization. After the disaster, young girls are being kidnapped and sold as sex slaves by ‘Slum King.’ Mari is a girl who’s desperately searching for her lover, Ken. The Kanto Hell Earthquake has completely demolished Japan. Top 20 Anime with Vampires That Will Make You Experience Thrill Best Gory Anime 37. (We will primarily be focusing on shows with more gore than plot, don’t go expecting an Anno Hideaki for all of these anime)