Yumiella Dolkness is your typical antagonist in an otome RPG, but she harbors a secret: she's the overpowered hidden boss. But Yumiella isn't who she seems to be. Once an introverted college student and avid gamer, Yumiella's goal is to avoid confrontation with the main characters and live a peaceful existence. Yet, despite her intentions, Yumiella's incredible stats beckon her gamer instincts, causing her to push her limits and reach the game's highest level. However, her achievement doesn't go unnoticed. Rumors circulate about her true identity, labeling her the feared Demon Lord. Can Yumiella, the OP villainess, gain back the serenity she always desired?