I'm the Villainess, So I'm Taming the Final Boss, Vol. 9 (light novel)

Villainess Aileen and Final Boss Claude try to keep their followers from finding out about their first clandestine date...only for all hell to break loose right from the start! Meanwhile, Elefas, one of the other final bosses and Aileen’s staunchest adherent, experiences love and anguish, while Walt and Kyle have rendezvous of their own!