Oresama Teacher volume 21 features story and art by Izumi Tsubaki.

Mafuyu has a typically bizarre visit to her hometown over winter break, but even that weirdness isn’t enough to prepare her for what’s going on back at Midorigaoka Academy—someone is impersonating Super Bun to do evil deeds! Can the Public Morals club unmask the creepy doppelganger before Super Bun’s reputation is permanently destroyed?!