Translated…
“The décor of this restaurant is so elegant, so beauty, the food served here, is delicious also, I can’t believe how dirty and unkempt their restrooms are, such a disappointment”, as she got back to her table, she’d told him, quietly.
from when they first met…
Even though so many years had passed, after the kids are in the elementary school years, every time she recalled the words she’d said to him on the night of their matchmaking, she’d still felt, that it was, a sort, of a horrible prediction.
this, is what the marriage looks like now…

So, the restaurant here, can be seen, as the metaphor of the woman and the man’s marriage, good looking on the front, but, the details of their marriage, just like the inside, smaller parts of the restaurant, i.e. the restrooms, the kitchens, are dirty, that just shows, how people tend to still just, focus on the external appearances when they first fall in love…