コマ4 — 刃先クローズアップ：主人公の刀が静かに血ではなく光を帯びる。冷たい息の白。 サウンドエフェクト（小文字）: すっ
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Below is a breakdown of why this series stands out and how it reshapes traditional isekai tropes. Core Premise: A Background Character Unleashes Chaos