Zero.

Summary

Zero, after leaving a village he had just destroyed, encounters a powerful octopus-like monster. Despite his initial intention to avoid conflict, he is drawn into battle when the creature emerges from the ground. The monster proves difficult to defeat due to its immortal body, which requires targeting its brain core. A mysterious woman provides hints about the monster's weaknesses, leading Zero to devise a strategy. He pretends to struggle in the fight to conceal his true strength, ultimately trapping the monster with a powerful move. However, he knows the creature isn't truly defeated and feels exhausted from the effort.

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