Yoshida Yuko, fifteen years old, is a transmigrator.
She suddenly grew horns and a tail and was told she was descended from the Dark Clan, but she looked more like a succubus, and she was incredibly weak.
Fortunately, she also got a "Demon Simulator," which lets her experience all kinds of things and earn rewards without affecting reality.
[You have arrived in the Demon Realm.]
[You rescued a red-haired little demon girl from drowning with your tail and learned her name is Satanichia.]
[You helped the demon rebels. From then on, the Demon Realm was no longer full of evil, and its people became honest and kind.]
[The name "Shadow Queen Yuko" spread throughout the Demon Realm, and you were written into the textbooks at the Demon Academy.]
That was until one familiar face after another appeared.
Tohru: "Your Highness Yuko, for the future of the dragon and demon clans, please let me be your personal maid!"
Homura Akemi: "You witch, give Madoka back to me!"
Satanichia: "You're my idol. Even if I can't surpass you, I'll completely possess you, Shadow Queen Yuko!"
Chiyoda Momo: "I had no idea you once nearly destroyed the world, Shamiko. Looks like I'll have to double your training."
Yuko: "???"
(A heavily reworked crossover world combining The Demon Girl Next Door, Miss Kobayashi's Dragon Maid, Puella Magi Madoka Magica, and Gabriel DropOut.)
