I'm the Villainess, So I'm Taming the Final Boss (Original Japanese Version)

During her public denouncement, Aileen Lauren Dautriche suddenly remembers her past life. She's 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!

After breaking off the engagement, Prince Cedric seizes all of Aileen's businesses. Aileen is in danger of being disowned and becoming a commoner if she doesn't recover the financial losses of the Dautriche family before the ball in two months...

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.

Aileen finds out that Claude's aide, Keith, has been selling demons. Keith tells Aileen why and reminisces about their past. Now that Aileen knows his feelings, she decides to work with Keith to prevent Claude from despairing and turning into a demon.

Aileen Lauren d’Autriche’s wedding plans have been suddenly canceled—by her own fiancé!

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 Aileen's identity.

James is suspicious of Aileen since she knows of his demon form. However, Ribbon's existence and Aileen's words "I want to protect you" softens his heart and he decides to work with her on the case.

Knowing that the prize of the contest for White Lily Princess is demon incense that's harmful to demons, Aileen removes her male disguise and enters the contest dressed as a woman. While others are overwhelmed by her beauty, James asks her to dance.

Aileen and the others infiltrate a black market auction that is trading demon incense. She meets the sorcerer Elephas Levi when she tries to sneak into the host's room.

Aileen Lauren d’Autriche’s wedding plans have been suddenly canceled—by her own fiancé!

Aileen Lauren d’Autriche’s wedding plans have been suddenly canceled—by her own fiancé!

Aileen falls into the sorcerer's village. While she is imprisoned, she finds out that this is all part of a coup d'état planned by the Levi family and that Lilia instigated their actions. Aileen discovers that Lilia has been serving the empress dowager.