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...
It's like, how can we trust it 
when you give it a name like that?
¿Pero cómo vamos a tomar en 
serio algo que tiene ese nombre?
¿Pero cómo vamos a tomar en 
serio algo que tiene ese nombre?
Como a gente pode confiar 
nele com um nome desses?