One of a kind in the world - unique skills for a lifetime. Slad, who possesses "Fully Automatic Support" and "Fully Automatic Weakening," was fired from his party one day after being treated as an obstacle by the heros. "Well, I guess they can do it without me." Slad tries to live a carefree adventurer's life with an elf girl, Echika. But without him, the heroic party struggles and the world is on the verge of extinction!