The power bestowed upon him surpasses even S-rank—the strongest weapon. During his baptism, Haise receives the <b>"Weapon Master"</b> ability, the details of which are unknown. He sets out on an adventure with his childhood friend, Sasha, but is expelled from their party for his inability to control his power. Furthermore, Haise is trapped in a deadly scheme and brought to the brink of death—but there, he discovers the true potential of his ability. It's a power that shakes the very laws of the world, one that allows him to summon weapons from another world!? To avoid ever being betrayed again, Haise single-handedly defeats countless monsters, rising to become an unprecedented S-rank solo adventurer. Seeking even greater heights, he resolves to challenge an unexplored labyrinth— He doesn't need companions. An unrivaled fantasy begins from adversity!