#Kämpfer (German for Fighter) is a 2009 anime adaptation fr. the light novel & manga by Toshihiko Tsukiji which has 12 episodes. It revolves about Natsuru Seno - a high school student with blue hair who has a crush on Kaede Sakura. But he found that he is a "female fighter" thanks to a stuffed tiger. Minami Kuribayashi performed the only opening theme for all 12 episodes.