Kenka Bancho Otome: Girl Beats Boys- 12 episodes
Hinako was convinced by her twin into swapping places with him in the all boy school, Shishiku Academy. And it's not just simple as that. It is a highschool full of delinquents and she has to fight her way all the way to the top.
The anime is based on otoge, Kenka Bancho Otome and runs for 10 minutes per episode which is too damn short! I wish it was a full blown series. @#!&% Not that we're lacking in the gender bender department. But I can never, ever get enough of this trope. Really. I think they also added the reality show post interview to give more insights to the characters since it's super short. It looks awkward though.
And you know there's too many gender bender when there are subset of tropes too. There is the twin twist of swapping with twin brothers like in the cases of You're Beautiful kdrama, Secret Girl manga and Ouji Sama No Tsukuri Kata manga. There's also identity swap like in Savage Garden manga.
There's the obligatory idol in the harem too. But I don't get it why the half brother doesn't realize it's not him. Or is he just pretending? My favorite bishonen is the lone wolf, I liked the part when he suddenly pressed her against the locker. It's refreshing that the heroine got bad ass martial arts skills. Even though her features are feminine, they balance it out by giving her a boyish built with the uniform that's too big for her. The background characters have this unfinished look just like in Heart no Kuni and Kamigami no Asobi. It feels so unnatural and it gives off the feeling that they are the last people on Earth.
Overall, I love the stark contrast of otome elements in a very manly setting of delinquents and non stop fighting. Reverse harem need not be ultra saccharine and everything nice.