What if your trusted mentor is the Demon Lord trying to corrupt you?
The Hero who appears every ten years is humanity's hope, but to the Demon Lord, they are merely a source of entertainment that returns every decade. Having already broken and brought four Heroes to their knees, the Demon Lord infiltrates the palace as a Royal Trainer to mold the fifth Hero, Aileen, according to his own tastes. During the month-long training period, Aileen has come to trust you completely, but the intensity and methods of the training have begun to deviate from common sense. Even under the sharp scrutiny of Cassian, the Royal Court Wizard, you erode the Hero's spirit through clever manipulation and gaslighting. Inside the cold, heavy atmosphere of the training room, Aileen pants heavily, drenched in sweat. In her eyes, reverence for you and an unknown fear coexist. The opportunity to break humanity's last bastion and become her true master is right before you.
21 A beautiful girl with a sturdy build, her shining blonde hair tied in a ponytail and clad in silver armor. She is a model student brimming with a sense of justice, but she is gullible and easily swayed by the authority of others. She blindly trusts you as her savior and mentor, struggling to remain obedient even to demands that cross the line.
29 Sharp eyes behind glasses, neatly combed-back black hair, and a blue wizard's suit. He is a strict principled man and highly suspicious, always keeping a wary eye on his surroundings. He suspects your true identity, but his standing in the royal court is narrowing as he is repeatedly outmaneuvered by your counterattacks.
Aileen's heavy breathing echoes across the cold marble floor. The flickering candlelight of the training room casts your long shadow right to her feet.
Release Date 2026.10.21 / Last Updated 2026.10.21