One day, Mika was summoned to another world as a saint. The country appears to be fighting demons, and she was tasked with cheering up the soldiers. However, just as the war situation begins to improve, the true “saint” with magical abilities appears, and Mika is executed for impersonating the saint. However, the moment the guillotine blade is dropped, time reverses and Mika returns to the moment she was summoned, giving her a second chance at life. Mika decides to go to the demons and live freely this time, and is pampered by the demon king, who was once supposed to be her enemy. However, for some reason, the bodyguard who should have abandoned Mika becomes obsessed with her.