A classroom mechanic like that could work and wouldn't be out of place thematically. Truth be told though, I'm just not interested in writing stories or making art involving any kind of bathroom stuff. No judgement on anyone who is interested in that, I would never want to kink shame anyone. However, for the record, I have no plans to add anything along those lines. Even if I were to write a scene where one of the girls wet themselves, I would probably have the camera cut away (as it did in the TV show you can watch in the dorms). So, if you are holding out for some scenes later in the game I am afraid I must disappoint you.