An Observation Log of My Fiancée Who Calls Herself a Villainess

Cecil is a crown prince who has mastered studies, etiquette, and state duties so easily that ordinary life no longer surprises him. His engagement to Bertia changes that. When they first meet, she declares that she is the villainess of a story she remembers from a previous life. She believes the world follows the route of an otome game and that her role is to act badly, lose to the heroine, and have the engagement annulled so Cecil can reach his proper ending. Cecil does not reject her. He finds her strange honesty interesting and begins watching her closely, treating every plan she announces as something to record and examine. Bertia tries to become selfish, cruel, and jealous, but her attempts keep helping people instead.

As they grow older, Bertia prepares for the future by giving warnings, listing events, and trying to push Cecil away from her. Cecil quietly uses the information to prevent disasters before they happen. Problems that were meant to ruin families or isolate classmates are corrected in the background because Bertia talks too much and trusts too easily. Her father changes his conduct after seeing what she knows. People who should have become enemies are drawn into safer paths. Even a darkness spirit connected to Bertia becomes part of the strange pattern she fails to understand. The expected heroine arrives, but Cecil has already chosen to protect the fiancée who keeps calling herself wicked while saving everyone around her. The story follows his observations as Bertia’s failed villainy rewrites the future she was trying to preserve, turning a scripted downfall into a life neither of them can fully predict.