Episode Title:
Before & After Time.
Episode Description:
While preparing for their midterm exams, the students of Class 3-E perform parkour outside of school grounds. However, Taiga Okajima and Kimura accidentally fall on Matsukata, an elderly principal of Wakaba Park Nursery School, who was on his way there by bike. As a result, Koro-sensei bans the students from studying for the midterms and has them volunteer at the nursery school until Matsukata recovers from his injured right femur. While the other students help entertain the naughty children and renovate the decrepit nursery school, Nagisa Shiota mentors a bullied girl named Sakura Kiyashiki, teaching her to find the strength to return to primary school. After two weeks, Matsukata returns to see the nursery school completely transformed into a safe and fun environment. With no time left to study, the students perform badly in the midterms, yet Karma Akabane scores second place overall due to studying during the summer. Having learned their lesson of being careful in using their newfound strength, the students receive new equipment for their future assassination efforts.
