Silead, a modern-day shut-in obsessed with ancient warfare and cold weaponry, one day dons a full crimson Japanese armor and a fearsome Raksasa mask.
But after a freak accident leaves him unconscious, he awakens to find himself on a real medieval battlefield—in another world.

There, mistaken for some resurrected dark god, he gets lanced thirteen times, slashed in close combat for seven rounds, and stabbed repeatedly without dying—
Until even the enemy gives up trying to kill him.

From that moment on, his “legend” begins in this strange new world… entirely by accident.