Preparation

After rewatched and taking some useful screenshots of the high school I started to draw the structure of the building since the anime only provided a little information about the structure :( To gain more information I started to read the manga and found out that it has a cafeteria ( but no pics from it :/ ) and on the roof stands a large tower that is actually used by the astronomic club. It took me longer than I expected cause I never was in a japanese high school before, so I just randomly draw the structure of the building until it looks like one lol.