An Observation Log of My Fiancée Who Calls Herself a Villainess

When Crown Prince Cecil is ten years old, he takes Bertia as his fiancée. She claims to have memories of her past life, and says that this is the world of an otome game she once played. She also says that she is a villainess. Cecil is generally bored, but her extraordinary statements spark curiosity in his heart.

Bertia struggles to correct the scenario she has unintentionally altered. At the same time, Cecil enters Halm Academy, a boarding school. During this time in which the two of them spend more and more time apart, Bertia's mother becomes pregnant and it leaves Bertia worried about one thing.

Bertia enrolls at Halm Academy, the same school as Cecil. And at the same time, so does Heronia.

For the sake of Cecil's future happiness, Bertia decides to play cupid to his personal aide candidates.

Heronia's attitude toward Bertia worsens. With Cecil studying abroad, the situation quickly escalates.

When Cecil learns that Bertia has been pushed down the stairs, he's assailed by an emotion he's never experienced before. Together with the members of the student council, he sets out to take retribution. They gather everyone in the courtyard in order to catch the true culprit.

Upon advancing to the high school division, Bertia begins avoiding Cecil. After turning the situation over in his mind, Cecil visits his father in order to investigate the nature of the Maiden of Destiny. The fated day, the graduation ceremony, quickly approaches.