Kyojuro Rengoku, a twenty-year-old young man who was trained in martial arts since he was little thanks to his father, Shinjuro Rengoku, to make him the best combatant in every known martial art, whether fist to fist or with weapons. On one of his last trips and during training in China, he ends up accidentally falling into the enchanted pools of Jusenkyo, creating a curse.

Now he's a girl! But, this happens only when the cold water touches him, having to reverse his curse to become a man again with the hot water.

This is embarrassing for Kyojuro, as he completely blames his father for forcing him to go to Jusenkyo. But the problems don't end there, of course not, because to top it all off his father has told him that he has engaged him to the daughter of an old friend and that they should get married now that they have returned to Japan... But Kyojuro doesn't know you at all! The worst thing of all is that when he appears before you, he does so in his girl form since it had rained before they could get to your family's house on time.