Aileen finds out that Cedric's new fiancée, Lilia Rainworth, has received threatening letters that were signed by herself. Since she has no memory of doing so, she has her friends help her find out the truth. On the night of the ball, Aileen attends wearing the dress and accessories given to her by Claude. At the same time, Lilia appears at the demon lord's castle.
When her engagement to the prince ends unceremoniously, details of the young noblewoman Aileen's past life come rushing back and help her realize she's living inside the world of one of her favorite otome games—as the heroine's greatest rival! However, her memory has more plot holes than bad fan fiction…and the only certainty is that if she doesn't do something quick, her death is all but assured. The hero/main-love-interest can't be relied on, so why not see what the last boss has to say?
