In the dark and twisted world of DOREIKU The Animation, a mysterious and sadistic game becomes the center of a chilling mystery. The story follows a young woman who discovers a set of bizarre, ritualistic instructions that, when followed, grant the user immense power over another person's mind and body. As she becomes entangled in this dangerous game, she crosses paths with a brilliant but emotionally detached detective who is investigating a series of bizarre, seemingly impossible crimes linked to these very rituals. Their fates intertwine as they delve into a shadowy underworld where desire and cruelty blur the lines between victim and perpetrator. With a gripping, psychological thriller atmosphere, the series explores the dark recesses of human obsession and the terrifying consequences of unchecked power. As the detective and the woman race to uncover the source of this malevolent force, they must confront their own demons, leading to a tense and suspenseful narrative that keeps viewers on the edge of their seats.