In a world ruled by female dominance, a true matriarchy, where 'Essence' determines one’s societal standing from birth, Eric Leonhardt awakens. Carrying memories of his previous life as Haruki Sawano and a love for the otome game "Eclipse of Destiny," he finds himself in a realm that mirrors the game's matriarchal structure and fantastical elements. Unique among Spiritusers, Eric gets equipped with a game-like leveling system, a rarity that sets him on a path of potential greatness despite the rigid Essence-based hierarchy. As he navigates a world fraught with danger from Rift-born creatures and complex social dynamics, Eric's journey is a delicate balance between the pursuit of power and navigating the otome-themed intrigues of love and alliances. His story, set against the backdrop of a society where women wield the most power, challenges traditional roles and expectations, pushing him to redefine what strength and destiny mean in a world captivated by the legacy of Essence.