Saikyou no Kurokishi ♂, Sentou Maid ♀ ni Tenshoku Shimashita

Once known across the realm as Albright, the indomitable "strongest Black Knight," his legend met an unexpected end—only for his soul to be reborn in a form as delicate as it was disarming. Now living as Maria, a gentle-eyed girl of sixteen whose very demeanor seems tailored for the ribbons she wears, he navigates a world far removed from the clangor of battle. In this second life, Maria serves as a trusted maid within the illustrious Marquess of Urband's household, her days dedicated to the care of the family's young daughter, Lady Relena. Yet the quiet rhythms of manor life are soon disrupted when an engagement is announced between Lady Relena and the kingdom's fourth prince. The corridors that Maria once walked in serene routine now hum with the preparations and tensions of a union that binds noble houses closer to the crown. As Relena's world grows busier and more entangled in courtly affairs, Maria finds her own duties shifting, her days consumed by the frantic pace of an impending royal match. The peace she discovered as a maid becomes ever more fragile. Surrounded by the splendor and expectation of high society, the soul of the former Black Knight must reconcile his old instincts with his new reality. While the shadows of his past life's power linger, the bustling present demands nothing more than a maid's discretion. But as whispers of conflict stir beneath the polished surface of aristocratic life, Maria's unique perspective—shaped by a life of war and a life of service—may prove to be the very thing that saves those she now holds dear from a growing threat.