I'm the Villainess, So I'm Taming the Final Boss, Vol. 4 (light novel)

Description

Aileen had set off on what was supposed to be a diplomatic mission to thecourt of Holy
King Baal—so how did she end up in his harem?! What'sworse, Baal is the final boss
from the third game in the series, and he'simmune to Claude's magic. Now that it's
come to this, is Aileen's only choiceto woo King Baal?