The Sket-dan get a new assistant homeroom teacher (who wants everyone to call her, Onee-san), but she's a klutz and is upset she can't be a good role model for the students, so the Sket-dan ask Chuu-san to help with some of his strange drugs. Later, Switch goes through some old inventions of his that didn't work out as intended...
Then I'm not gonna shoot it! How much 
power does this Cheering-Up Bazooka have?!
Então não vou lançar! Quanto 
poder a bazuca da animação tem?!