Koro-sensei Q!

Sinopsis

A spin-off of Assassination Classroom (Ansatsu Kyoushitsu). Aired in Japanese cinemas alongside Assassination Classroom the Movie: 365 Days‘ Time (Ansatsu Kyoushitsu Movie: 365-Nichi no Jikan), and later reused as episode 2 of the ONA series Koro-sensei Q!