Class is in session—and it’s out of control! Sakata Ginpachi teaches Gintama High School’s Class 3-Z, a ragtag bunch of idol otaku, stalkers, mayo guzzlers, sadists, and more. Fights break out, rules are ignored, and sanity is optional. Every day spirals into chaos, but Ginpachi somehow survives it all with nonchalance and almost zero effort. When the bell rings, chaos begins!
Principal Hata challenges their teacher Ginpachi to have every student score over 80 in a test otherwise the class faces remedial lessons and Ginpachi gets a pay cut. Ginpachi and his students decide to do a cheating plan.
Ginpachi arrives at his class and sees that his students change based on what he says.
Takasugi Shinsuke is back after a long suspension. But he doesn't seem to be the biggest problem...
Late at night, Shinpachi goes back to school for something forgotten and runs into Kagura and Ginpachi. Shinpachi recalls the "Seven wonders". Ginpachi laughs it off, but suddenly a mysterious voice echoes from the empty room.
Three bank robbers are hiding in the school and Hata decides to offer a reward for them.
Sakata Ginpachi, Class 3-Z’s eccentric homeroom teacher, tries to guide his equally eccentric students!
The students of class 3-Z start doing a general cleaning of the school.
Class 3-Z goes on a school trip to Kyoto, and Hijikata tries to make sure everyone follows the rules.
The school festival is coming, and all the problems that come with it.
The gang members of class 3-Z become involved in the monk pants raid that affects all of Kabukicho.
Kamui decides to confront Takasugi and the other gang members from Gintama High School to settle everything once and for all.
Some time after graduating, Shinpachi decides to organize a reunion with the former students of class 3-Z.
