"This academy has several forbidden taboos—" Seirin Girls’ Academy — a prestigious school with a long history, known as one of the top institutions for training refined young ladies. Mio Tsujiura, a recent transfer student, finds herself strangely drawn to a girl named Yuuka Nekonome, someone everyone in the academy says must never be involved with. But after meeting Yuuka, Mio is caught up in a series of bizarre and inexplicable events. Because — Yuuka Nekonome is already dead. Who exactly is she? And what is the dark secret hidden within this seemingly graceful academy, filled with beautiful, elegant girls? A chilling school mystery horror that crawls under your skin — where unease and psychological fear intertwine in the most disturbing way!