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...
This'll be fine, no problem! Just put 
everything back in its place in a jiffy...
¡No se preocupen! ¡Pondré 
todo en su lugar en un instante!
¡No os preocupéis! ¡Pondré 
todo en su sitio en un instante!
Vai ficar tudo bem! Eu já 
coloco tudo de volta no lugar!