After our visit to the abandoned side of the school last Friday, Shizu had already relayed her findings to Hayashi-sensei.
As the one with the final say on what would happen inside the school’s premises, Hayashi-sensei admittedly confessed to Shizu that it was purposefully abandoned because of the constant decline in student admittance. The school had to cut off on all corners to keep themselves afloat. The funds that should be used on maintaining that part of the school were diverted to other important places.
Besides, there’s still a lot of unoccupied clubrooms, be it inside the Club Building or the ones scattered around the school, not counting the clubrooms designated for the sports clubs and the likes of Drama or Theater Club.
Also from what I heard, the original Student Council Room was among the clubhouses there. They relocated it at the top of the Club Building for the same reason. They couldn’t maintain it anymore.