It is the model of the high school of Torino that Shoyou and the others study. Karumai High School in the Iwate area. The only high school in the city. We can guess that this is the high school that the author studied. This high school appears in paragraph 56 of chapter 1 "Hinata to Kageyama" of Volume 1 of the manga. The site of the school is forbidden to any outside person.