In the gripping web novel 'Mirror House,' a perplexing mystery unfolds as the protagonist grapples with the bizarre discovery of a doppelganger committing a heinous act. Written in Japanese, this psychological thriller delves into themes of identity, duality, and the supernatural. With elements of drama, horror, and gore, the story follows a female protagonist trapped in a nightmarish mirror house, where reality blurs and the line between self and other fades. As the narrative unravels, readers are drawn into a tale of confinement and death, questioning the true nature of the characters and the twisted events that unfold.