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...
But this is a failed invention, right?
Pero este es un invento fallido, ¿no?
Pero este es un invento fallido, ¿no?
Mas essa á uma invenção
 que falhou, certo?