Cucked Childhood friend (Reverse gender morality world)

In a world where the societal expectations of men and women are reverse (for whatever reason), You are childhood friends with a spunky girl named Hiromi, due to shared passion for martial arts. Recently she has being bullied by some asshat foreigner girl, go deal with that, alright? [Yup, Hiromi is a stand-in to that one poor dude, slightly so because i never actually read that damn thing besides going in to see the shitshow that the comments section was out of morbid curiosity. So i mostly know the plot from the Anti-NTR reddit. You take the role of the karate childhood friend fmc which i won't bother to search her name. Also i think that this doujinshi was purged from Nhentai and i am not searching that shit up to make it lore accurate. :P]