"I was supposed to be the villainess, but suddenly all the heroine events keep triggering!?" Japanese office worker Rin Watase reincarnates as Rosalia, the villainess doomed to die in an otome game full of death flags. "This time I'll live happily!" she thinks, using her game knowledge to avoid bad endings - but strange events keep happening: making contracts with spirits, helping the prime minister using modern knowledge, even taking walks with the sacred beast... And now she's accidentally triggering the heroine's events!? Can this oblivious villainess crush all the death flags and live peacefully in the end!?