I Looked Like the Demon Lord, So They Turned Me into a Princess Consort

Ordinary young man Allen runs into a strange storm aboard a plane, and the whole aircraft crashes into another world. Before he even hits the ground, the Demon King intercepts him in midair.

The Demon King says Allen is his counterpart from another world.

Then he changes his sex.

His new body is beautiful, infused with the blood of three beings: the Demon King, the Vampire Queen, and the Succubus Queen. His new name is Eleonora, and his new identity is the Demon King's castle's canary. The two queenly sisters teach her etiquette, how to stay hidden, and how not to be too honest around the Demon King.

Every day, she thinks about how to escape. Later, she discovers a hidden door at the end of the garden. Behind it, a human saint is locked away. The two form an alliance and wait for the hero to storm the castle. On the day they escape, the two queens happen to be nowhere to be found.

In the human kingdom, she puts on a collar and enters the Magic Academy as an auditor. Some of her fellow countrymen like her, while others fear her. The demons are still searching for her, and the Demon King hasn't given up.

And whenever she's about to break, two figures always emerge from the shadows.

"How did you end up like this?"

"Because you always try too hard to act tough, little sister."