LET'S DESTROY EVERYTHING AND FIGHT ALONGSIDE EACH OTHER FOREVER.

Haruka thought she was dreaming when a beautiful man who claimed to be the Demon King fell from the sky and swept her off her feet, taking her to the heights of pleasure with his gentle touch. Despite their supposed past as arch rivals, he does his best to make her every wish come true in the hope of making her completely happy.
Perhaps it's because of her past life as a Saint, but she has trouble finding bliss if it's only one-sided and wants him to be happy too. It seems the more time she spends in his arms, the more she remembers her former life and the more she sees how he was the only one who understood her. And yet, this is the same man who admits he wants to utterly destroy her!