The world-unrivaled charismatic beautiful girl who rescues the prince from ferocious bandits and captivates young ladies at tea parties!! The legend of the strongest lady, Mercedes, begins!! Countess Mercedes, with her lustrous long hair and gallant red eyes, is a lady granted "Tenka Gomen"—the privilege to act without the King's formal approval. She possesses memories of an Otome game she played in her previous life. It's a memory of a bad end where she was called the "Laughing Berserker," a martial-type villainess who wielded her sword alone against scores of soldiers and met a sublime end. The reincarnated Mercedes tries to avoid this bad end, but her life is, as expected, full of ups and downs!