Description: Satou Ryouta, a salaryman working for an exploitative company, suddenly finds himself inside an unfamiliar dungeon in a strange world where monsters drop all sorts of items as loot. With the help of a girl he happens to run into named Emily, he's able to check his own stats... and finds that all of them, both physical and magical, are at rank F (the weakest! What's more, his level is stuck at 1 (the lowest! Ryouta is on the verge of utter despair... but then he learns that he also has "Drop Skill All S," the most powerful unique skill there is! Can Ryouta manage to survive in this bizarre world?! The strongest and weakest adventure of all is about to begin!