Season 1 :
At the bottom floor of the building with a dog signboard, in the shopping district near the office street, there lies a cafeteria called "Youshoku no Nekoya," that has an illustration of a cat on the door. It's been open for fifty years and has satisfied various salarymen from nearby offices. Despite it being called a Western cuisine cafeteria, it also provides other varieties of menus. For the people of this certain world, it's their one-and-only special cafeteria.
There is, however, one secret to "Nekoya." The cafeteria is closed to the public every Saturday in order to make way for special guests. When a bell rings, customers from different places of birth and races appear who ask for mysterious and delicious dishes. They are actually the same dishes served to the salarymen, but these special guests find them to be more exotic than to what they are used to. As the cafeteria aims to serve masterpieces, it is usually referred as "Isekai Shokudou."
And so, the bell rings again this week.
Season 2 :
There is a certain restaurant in the first basement level of a multi-tenant building in one corner of a shopping street near the office district. The historical restaurant, marked by a sign with a picture of a cat, is called "Western Cuisine Nekoya." This restaurant looks completely normal through the weak, but on Saturdays, it opens in secret exclusively to some very unique guests. During these hours, doors in various areas of a parallel world open to allow customers of many different races and cultures into the restaurant.