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

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. The final boss of the Regalia of Saints, Demons, and Maidens fan disk wishes to meet with Claude. Levi hopes that Claude will reconsider the treatment of the Levi family. That night, Aileen receives a report that Claude is stabbed in the abdomen by someone?!