On a deserted street somewhere in Kyoto resides a Japanese style pub called "Izakaya Nobu." But this hole in the wall holds a secret: its entrance is mysteriously linked to another world! Chief Yazawa Nobuyuki and his server, Senke Shinobu, have decided to open up business in this distant and strange land, an ancient city known as "Aitheria." Palace guards, craftsmen, merchants, noblemen... Nobu's doors are open for business, welcoming one and all with a cold beer and a warm meal!
Summary taken from: MyAnimeList