Iphius, the sixth Demon King and the only one to become a Demon King through acquired power, is betrayed in a plot by the other Demon Kings and sent into a rift in space and time, his fate unknown.
When Iphius wakes up again, his world has fallen apart.
One piece of good news, one piece of bad news.
The good news: he's alive.
The bad news: he's alive, but his brothers are gone, the demons are gone, and he's become a cute little girl!
What? You're saying this tiny girl with blue eyes and long, straight black hair, who doesn't even reach 1.4 meters tall, is me?
What? You're saying this useless beauty who can't even cast the lowest-level spell is me?
Right, right, you're absolutely right. It's the adorable and charming me, Eve! Please spare me, big sis!
From then on, he becomes she, takes the name Eve, and starts a hell-difficulty survival campaign, with a side of flirting with girls.