Immediately after defeating the Demon King, the Hero Astel is affected by mysterious magic and transformed into a woman. The now-female Astel has lost all of the power she once held as the Hero, but she soon finds that not to be so much of a problem. Such strength is unnecessary while the world begins to rebuild and advance peacefully.
She gets a new job and tries to live her second life to the fullest… until old foes reemerge. The “true demons” that should have been eradicated alongside the Demon King!
And thus does the curtain rise on a grand tale spanning the ages and shaking the foundations of fate itself.