On that day, the forty-one students of Shiramine Private Academy's Class 2-7 were, without any prior warning, thrust into a magical parallel world, distinct from Earth, by a sudden anomaly.

Scattered across a vast dungeon, they are armed with the power of "Heavenly Vocation," a blessing bestowed by God,

and make their way towards the deepest part, where their only means of escape is said to lie.

Some bravely, some freely, and others with cruel wickedness, they aim to conquer the dungeon.

However, among them is one student who received a Heavenly Vocation with absolutely no combat abilities.

Attendance Number 19, Kotaro Momokawa.

A small, delicate boy from the literature club, he possesses no magical power, no talent with a sword, and no exceptional physical abilities.

Relying solely on his given Heavenly Vocation, "Curse Weaver," he follows after his powerful classmates—

Survival instincts fully unleashed! Extreme otherworld dungeon survival.

A beautiful yet gruesome battle royale, where they trust and love, yet betray and kill each other, unfolds.