A Misanthrope Teaches a Class for Demi-Humans, Vol. 4

Last year I resolved tensions with Haruna, the source of my trauma, and made overall progress on my misanthropic tendencies. Now I ve proudly witnessed another student s graduation and set new goals for myself as a teacher. There aren t any students advancing to the next grade...but that's when three mysterious beauties appear at my school! They claim they re the principal s sisters and that they ve come to get their brother back. And not only that, they want to join my advanced class! Needless to say, I ve got some worries about my fourth year here at Shiranui Private High School...