Kampfer
"Kämpfer" is a story about Natsuru Senou, a high school student who wakes up one day to discover that he has been chosen to be a "Kämpfer," a special kind of warrior who must fight other Kämpfers in order to survive. Kämpfers are divided into two groups, "white" and "black," and must fight each other until only one group remains. One of the story's unique elements is that when Natsuru transforms into a Kämpfer, he becomes a girl rather than a boy. This creates some interesting situations as Natsuru attempts to navigate his new life as a girl, such as dealing with things like changing in the girls' locker room and unexpectedly attracting the attention of his male classmates.
Despite the story's gender-bending elements, "Kämpfer" is primarily an action-comedy series with lots of fighting and humor. Natsuru must also navigate his relationships with the other characters in the series, including his childhood friend Kaede, the mysterious Kämpfer Shizuku, and the aggressive Kämpfer Akane. Overall, "Kämpfer" is a fun and entertaining series that takes a fresh approach to the action-comedy genre. It should be noted, however, that the series contains some mature themes and content, so it may not be appropriate for all audiences.
Author: Toshihiko Tsukiji
Original run: April 2008 – August 2013
Volumes: 10
Status: Completed
Buy here: https://www.amazon.fr/K%C3%A4mpfer-Vol-Shonen-Manga-English-ebook/dp/B00KO5GLT0