The story "The Strings of Madness" can be categorized as a psychological thriller. It is a story about a young woman who is being manipulated and controlled by a skilled manipulator. The story explores the dark side of human nature and the devastating consequences of manipulation.
The story could also be categorized as a horror story, as it contains elements of suspense, dread, and violence. The dark figures that Haruka sees in her nightmares can be seen as a manifestation of her deepest fears, and Kuro's manipulative behavior can be seen as a form of psychological horror.
Ultimately, the story of "The Strings of Madness" is a complex and disturbing tale that defies easy categorization. It is a story that will stay with readers long after they finish reading it.