The Demon King Transformed into a Woman and the Peculiar Hero

In the demon king's castle, the demon king "Belcardo" is in combat with the hero "Michael." Seeing Michael gathering power to unleash a technique with his holy sword, Belcardo fired the magic bullet he had developed for this very moment—or so it should have been. But what's this?! The magic bullet was deflected by Michael's armor... and Belcardo became a woman! Yes, the magic bullet he had developed was one that "transforms whoever is shot into a female form." "The hero coming in armor that reflects magic bullets? The demon king never heard anything about that."