Waking up as a girl might be some guys’ fantasies, but when the suddenly effeminatized Natsuru is told that he’s a Kämpfer, one who fights other Kämpfers in female form, his life becomes a nightmare! Putting aside the obvious plumbing issues, Natsuru’s best friend has a crush on his new body. Not complex enough? His school has separate sections for boys and girls, so he's now double enrolled. Hormones and fists will fly as the new gender-blender defender must become a contender or die!