From Kodansha:
Ryota Sato gets the surprise of his life when he's suddenly transported into another world and nearly clobbered at the hands of the young, pretty adventurer Emily Brown.
This new world revolves around defeating monsters and profiting from whatever they drop - food, money, items, etc. Unfortunately for Ryota, he has no skills to speak of until he learns he has the ability to get rare drops. Suddenly his luck turns around or does it?

Official English