Manaka Makoto, a 24-year-old single salaryman, wakes up one morning to find himself suddenly transformed into a woman, a stunning beauty who attracts nearly everyone of the opposite sex. After learning from a magical being that the only way to regain his male form is by becoming aroused (as a woman), he attempts to find a way back but fails. However, when he finally succeeds and switches back, he discovers that he will toggle between genders anytime he gets close to someone sexually, with certain exceptions…