Ep. 1922: First-year Ha-class' Secret Base
Aired on May 26, 2016

1922
Heidayuu and Sajirou have recently begun spending their days off together independently. Curious about their absence, Rantarou, Kirimaru, and Shinbei decide to secretly trail the pair. They follow them into a forest, where they eventually discover a hidden location. The narrative focuses on the group's investigation into the whereabouts of their classmates during their leisure time.
Episodes
- Ep. 1918 · Tsugiya Sannosuke Returns to His Part-time Job at the Comb Shop
- Ep. 1919 · Rantarou and friends deliver a letter that gets eaten by a goat
- Ep. 1920 · Kanzaki and Urakaze assist Makaino Kouji with his mail order sales
- Ep. 1921 · Igasaki Magohei visits Santanda Kazuma to view the pleasant scenery from a warehouse window.
- Ep. 1922 · First-year Ha-class' Secret Base
- Ep. 1923 · Tachibana Senzou encounters Isaku and the troublesome duo Shinbei and Kisanta
- Ep. 1924 · The Bandit Who Joined Hama Shuichirou and the Explosives Committee
- Ep. 1925 · Magojirou loses his Ninja Book and seeks help from Hinata and Shadou sensei
- Ep. 1926 · Yuki, Tomomi, and Oshige seek Igasaki as a tutor for their supplementary class