I'm the Villainess, So I'm Taming the Final Boss Novel Volume 5 is written by Sarasa Nagase with illustrations by Mai Murasaki.

Could Aileen and Claude's marriage be a mistake? A man claiming to be Claude's demonic father certainly thinks so, and he's determined to have his son divorce his wife and return to the realm of demons. But as Aileen resolves to win her father-in-law's approval by any means necessary, a candidate for the next queen of Hausel declares herself the demon king’s true soul mate. Is the love between Claude and Aileen strong enough to defy destiny itself?