If you bring your own food, it is recommended to go to the restaurant on the first floor because the library does not allow it. There are seats outside the restaurant, so it is estimated that the restaurant is not allowed to bring its own food. There are not many people before 12 and 1 at ordinary times, and there is no hurry. It's hard to say during the rush hour. If you are thrown out, you can sit on the stairs facing the library door on the first floor for dinner. In fact, it is quite clean, and many people sit there and have a rest.