Maybe

It's just that there is no content in the school. The same lessons and exams are just a few pictures. There are not enough scenes at school with lessons, tasks and corruption. After all, this is the city of Futanari, so why is there no content in the school where they should teach. At this time, School is empty and school time is needed only to raise the necessary skills. (Need content in school)
There are already 2 cunning teachers + students and they are all Futanari, so why not add scenes with lessons, tasks and events for the school.
+ + you can do that GG will meet someone from school in the city !and someone from school will come to GG at work or home (Check) to do what gg can meet in non-schools (Futanari teacher, students and Futanari student and make them scenes)
(These are just examples)