At the corner of a shopping street near the business district, there is a mixed-use building with a dog sign, and the store is located on the basement floor. The restaurant with a cat pattern painted on the door is called "Cat Western Restaurant". Since its establishment 50 years ago, it has continued to satisfy the appetites of office workers in the business district. Although it is a Western restaurant, it also has a very rich menu other than Western food. It is an ordinary restaurant with only this feature. This inconspicuous little restaurant is closed every Saturday, but in fact it welcomes "guests from another world" on this day: every Saturday, a door will appear on the wall of the store, and these guests, whether they are humans, demons, ghosts, elves, lizardmen, vampires, orcs, or the legendary dragon (!?), will come from "inside the door"! Those visitors who have triggered the visitor bell and are of various origins and races are looking for extremely rare and incredible delicious dishes. No, those are all dishes that people in the business district have long been accustomed to seeing and eating. However, for the "Saturday guests" = "people in a certain world", all of them are unheard of dishes. The people in "a certain world" call the "cat restaurant" that can serve special and exquisite dishes "Another World Restaurant". This week, the visitor bell will ring again!