Seijo no Soshitsu ga nai no de, Last Boss o Mezasu Koto ni Shimashita

Exhausted by the relentless demands of a toxic workplace, Rina Amakusa is suddenly pulled from her mundane life when a mysterious voice guides her into the world of a video game she once adored. Reborn as a saintess, she dedicates herself entirely to her new role, enduring countless time loops in a tireless effort to save the realm from ruin. Despite her unwavering devotion and sacrifice, her journey takes a devastating turn when she is betrayed and murdered by the very character she cherished above all others. The profound heartbreak shatters her spirit, twisting her deep affection into an all-consuming hatred. Stripped of her saintly grace, this emotional metamorphosis sets her on a dark new path, transforming her from a savior into the ultimate antagonist. No longer bound by the expectations of heroism, Rina abandons her former mission and resolves to claim the mantle of the final boss herself. Driven by vengeance and fueled by the pain of her betrayal, she turns against the world she once fought so desperately to protect. Her story unfolds as a gripping fantasy tale of retribution, where a broken saintess rises to become the greatest threat the game world has ever known.