Master spy Twilight is unmatched when it comes to undercover operations on behalf of the Westalis intelligence agency, WISE. However, he faces his most daunting challenge yet when he is assigned Operation Strix: a top-secret mission requiring him to infiltrate an elite school to get close to a reclusive Ostani politician. To do this, he must construct a fake family from scratch in mere days. Under the alias Loid Forger, he adopts an adorable orphan girl named Anya, completely unaware that she possesses telepathic powers. To complete the ruse, he enters a marriage of convenience with Yor Briar, a soft-spoken clerk who secretly Moonlights as the deadly assassin known as the Thorn Princess. With everyone hiding their true identities, this bizarre patchwork family begins their chaotic new life together.