Ayumu Narumi's life takes a drastic turn when his older brother Kiyotaka, a renowned detective and skilled pianist, suddenly goes missing. The only clue left behind is a mysterious and cryptic reference to the "Blade Children." Two years later, a string of murders and unexplained incidents begins to unfold, all seemingly linked to the enigmatic Blade Children. Joining forces with a determined school journalist, Hiyono Yuizaki, Narumi embarks on a perilous journey to unravel the truth behind the Blade Children and uncover the secrets surrounding his brother's disappearance.
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