Glass Castle

Matoba Ikuko is a plain, gloomy, and unfriendly office worker, remarkable only for her fast and precise work. Her analytical mind snaps into focus when the company's general manager is brutally murdered during a corporate retreat. Meanwhile, hardworking sales manager Mikami Tazuko, who witnessed her manager's affair on the trip, begins crafting her own theories in a private social media diary. As the investigation unfolds, long-concealed internal problems within the team surface, with each new clue leading toward a truth more disturbing than the murder itself.