Not sure if anyone has done this concept but here we go. Once upon a time, Ranma decided he had had enough of the Male Kunos' shenanigans and was basically like "Fuck this shit I'm out" so his mom showed him a pamphlet for Kuoh Academy. Only one catch: he has to go as a girl as this is just before the implementation of the academy becoming a co-ed school but after Ranma arrives is when he gets dragged kicking and screaming maybe even literally into the daily squabbles of the ORC. If anyone wants to expand this, go right ahead and don't be afraid to make Rias smother Ranma with affection because of his girl form looking like a younger Rias. Also NO ISSEI BECAUSE FUCK HIM HE IS HAPPOSAI'S DISCIPLE