Hana no Kishi(Knight of flower) is a shoujo manga. I’m not much of a shoujo manga fan but this manga is very interesting. Sei is the next head of the Ohtori Family, Kurono Ran dedicated her life to become Sei‘s First Knight after her brother Kurono Rin was Killed trying to protect Sei. Though there are 11 different families that want to become the Ohtori family’s First knight which leads Ran to get in sword duals to earn her position as the next head’s first knight.
You have to read the manga! Its amazing!!
General information:
Published: 2010 to 2011
Genres: Romance, School, Shoujo, Gender Bender
Author: Nishikata, Mai
Volumes: 5
Chapters: 29
Overall Rate: 8/10
I believe that the story was cut short, but its still awesome!
Interested in Reading the manga? Click here
SayuriCero 
I don’t know why but gender bender mangas always attract me..! lol!
Lol! Well this one is one of the most interesting gender blend mangas out there ;p it’s worth reading