It refers to a lunch with rice and various side dishes.

This is just a general statement, which has no practical significance.

Even if it's called "inside the curtain", there are actually many kinds of lunches and dishes.

A little supplement

Actually, this is not a lunch box.

This is a candy store.

One of their fancy candies is to sell them in the style of box lunch.

The food and food on the stool are made of candy.

Duぁめ

420= Kyoto syrup

420 yen