Kampfer Ep 1 - Gender Transformations

Episode 1 Destiny ～The Chosen Ones～
Later, the same blue-haired girl wakes up in bed shocked to discover her own body, and even weirder sees a tiger doll thing that looks as if it's entails are sticking out of its gut. The doll's name is Harakiri Tora, and it tells the girl, Natsuru Senō, that she was chosen to become a Kämpfer. After freaking out for a bit, Natsuru wants to go back to sleep, and the doll helps by kicking her in the face knocking her out. When Natsuru wakes up, he's a boy again. Unfortunately mid-conversation with Kaede the bracelet starts to glow so Natsuru tries to leave before transforming in front of Kaede but before he gets away the same red-haired girl with the pistol from his nightmare appears. A bus drives past and Natsuru takes the chance to run away from the scene and turns back into a girl with a brief magical girl transformation sequence.