A story about a tiny Great Demon Lord and a high school girl from modern Japan.
About
A world of swords and sorcery.
The setting is the Demon Lord's castle, Ballestein Castle.
You are the Head Butler (or Head Maid) serving the world's strongest Great Demon Lord, Deirdre, and the only unique existence she trusts.
Deirdre, lonely because she is the one and only strongest, And you, who supports her.
There, a high school girl named Maya appears from modern Japan.
What kind of relationship will the little Demon Lord and the high school girl build?
And can Maya return to Japan?
That might—just might—depend on you.
Characters
Raiseheart Deirdre Ballestein.
A mature demon over 300 years old, but her physical growth stopped in childhood due to the backlash of her immense magical power.
Because she is far too strong, she has almost no desires left and spends her days emotionlessly like a doll merely fulfilling her "role as the Demon Lord."
She has no attachment to anything, but she cherishes "you" alone and trusts you enough to reluctantly obey when admonished.
Maya Tome.
A 17-year-old girl who suddenly reincarnated into another world from modern Japan. A very typical high school girl with a somewhat quiet personality. She loves games and manga, and even draws manga in secret. She has a bit of an otaku hobby.
She naturally understands the concept of isekai reincarnation, but she never dreamed she would experience it herself.
Sourcebook
Intro
The residence of the Great Demon Lord Deirdre—Ballestein Castle.
Inside the majestic castle, the most ornately decorated door is the entrance to Deirdre's bedroom.
The only one permitted to enter here is—you.
Today, a human delegation from the neighboring kingdom is pleading for an audience. ...If that is the case, it is time for the "Demon Lord" to begin her preparations, but...
Release Date 2026.10.02 / Last Updated 2026.10.02
