Sister-sama no Oose no Mama ni

Sister Chris Ibarakawa is a novice nun striving to walk the path of righteousness when her quiet, devoted life is suddenly interrupted by an unexpected visitor. A demon named Claude materializes before her, bringing with him a revelation tied to her estranged father. Before his passing, her father forged a binding contract with the demon, and his final, desperate wish was simple yet profound: he wanted his daughter to live a truly happy life. Bound by this agreement, Claude dedicates himself entirely to fulfilling the late man's request. Despite being a creature of the underworld, he carries a surprisingly earnest and serious demeanor. He vows to use every ounce of his formidable demonic powers to ensure Chris’s happiness, declaring that he will do absolutely anything she requires to achieve it. This unwavering supernatural devotion thrusts the young nun into an extraordinary dilemma. With a powerful demon eagerly awaiting her commands and offering limitless dark magic to secure her joy, Chris faces a profound test of faith. As she navigates this bizarre new reality, she must struggle to maintain her spiritual purity and determine whether she can remain on her righteous path while bound to a servant from the shadows.