Supreme Spouse System.

Leon Walker, a weary genius from the modern world, meets an untimely end at the hands of the infamous Truck-Kun. Yet, death is merely the beginning of his extraordinary journey. Reborn in the realm of Galvia, he inhabits the body of Duke Leon Moonwalker, a powerful yet faltering figure among the Grand Dukes of the Moonstone Kingdom. As he grapples with his new identity and the complexities of a world filled with magic and intrigue, a mysterious voice activates a unique system within him: the "Supreme Spouse System." This unexpected twist presents Leon with opportunities and challenges he never anticipated, forcing him to navigate political machinations, forge alliances, and redefine what it means to be a leader.