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 of Bertia's fall on the stairs, he's struck by unfamiliar emotions and sets out for revenge.

Bertia joins the high school division and begins avoiding Cecil as the fated day, his graduation, approaches.

It's the day of the graduation ceremony. Bertia is resolved to have the tables turned on her and be struck speechless just as the game scenario dictates, but Cecil has prepared something entirely different. Then Heronia speaks up, accusing the villainess Bertia of heinous crimes.

Cecil has been knocked unconscious by the light spirit, Pii-chan, who makes him live in a what-if world in a realm of pure consciousness. The Cecil of that world, where everything unfolds according to the game's original scenario, is as cold and emotionless as a doll, and as Cecil experiences that for himself, his own consciousness begins drifting closer to that of a doll, too.