A GB arch could be interesting, same premise as this short with only Fujimiya still female, the setup could change slightly to include the magical girls: the crew could have a cookout at a park, the doctors bring out their Gender BendinatorTM for funsies, Mamu and Maria(?) come to break up the party, the inator goes off turning everyone (except Fujimiya) into guys, shenanigans inssue.