I'm the Villainess, So I'm Taming the Final Boss

During her public denouncement, Aileen Lauren Dautriche suddenly remembers her past life. Shes the villainess from an otome game she once played that will die in terrible ways! She must survive! The best way to ensure her survival? Tame the last boss!

Aileen finds out that Cedrics 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 lords castle.

James turns into a demon at a different point from the original game, but Aileen decides he can still revert back and lets him escape. However, the student council member Walt Lizanis witnesses the scene and begins to doubt Aileens identity. In turn, she exposes Walt and Kyle Elfords true identities and their mission. They decide to temporarily work together to solve the vampire case. Meanwhile, Mische Academy receives another statement from Ashtarte...

Knowing that the prize of the contest for White Lily Princess is demon incense thats harmful to demons, Aileen removes her male student disguise and enters the contest dressed as a woman. While others are overwhelmed by her beauty, James asks her to dance. The light dance steps of the pair fascinates the audience and Aileen is chosen to be the White Lily Princess. However, right after that, the mastermind has demon incense scattered throughout the venue. Aileen and the others struggle in vain as James turns into a demon.

Claude loses his memory and magical powers, returning him into a normal human being. In order to show the appeal of that aspect to the public, he goes on an inspection of the third zone of the imperial capital. During this time, Aileen follows Claude and tries to confirm her position as his fiancée. However, she just ends up experiencing the bitter feelings of a one-sided love. When she returns to the demon lords castle, she finds the heroine of Regalia Of Saints, Demons, and Maidens 2, Selena Gilbert, fighting for demon incense with Auguste Zelm, the official hero...

Aileen falls into the sorcerers village. While she is imprisoned, she finds out that this is all part of a coup détat planned by the Levi family and that Lilia instigated their actions. Aileen discovers that Lilia has been secretly serving the empress dowager and she escapes the prison after winning Elephas, who has been branded as a traitor, over to her side. The two of them rush to the imperial palace to save the doomed Levi family and Claude. However, Lilia stands in their way with another holy sword in her hands.