For Natsuru, waking up as a gorgeous girl was supposed to be a dream come true, but things take a dark turn when a stuffed tiger reveals he is now a Kampfer, a mystical warrior forced to fight other Kampfers while in female form, turning his existence into a living hell. Beyond the obvious biological complications, his best childhood friend reveals she is attracted to his new female body, adding romantic confusion to the mix. The situation worsens as his school’s separate boys’ and girls’ sections force him to double enroll, sparking rumors that he is dating himself. Meanwhile, rival Kampfers at school threaten his life, though he cannot tell if their intentions are romantic or lethal. With opponents wielding swords and guns, and hormones running wild, this reluctant gender-bending fighter must fight to survive or perish.