There's this pub (Izakaya) that was supposed to be in a certain place in Kanto region of Japan called "Gen".
After opening the door one day, it was found to be connected to the city of Parisia, the Kingdom of the Eastern Kingdom…
Individual residents from a foreign world such as fallen monks, warriors, noble female knight, daughters of noisy famous aristocrats, etc. all visited the peculiar izakaya which they've never seen before, and gradually they'll become fans of the dishes…
A foreign world gourmet fantasy has finally started!

*From the same author of Isekai Izakaya "Nobu", which takes place in Kyoto.

Imagine there is a bar with many weird kind of food and drink that might bring you to another world! The bar, so-called "Nobu" is located in a alley of the old city Aiteria. AT the very first step, diners feels like falling into another completely country, with cold, super cool beer, so-called "toriaezu Nama"!