I'm the Villainess, So I'm Taming the Final Boss(2017)

Akuyaku Reijou nano de Last Boss wo Kattemimashita

When Aileen, the Duke’s daughter, regains her memories of her past life, she realizes she’s barreling toward ruin at full speed. Searching for any way out of her hopeless situation, the method she chooses is to capture the heart of the last boss— the Demon Lord Claude!

(Source: Yen Press)