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...
You'd throw away who you are. 
Think of what that means.
Lo que la hace ser especial 
nunca podrá recuperarse.
Lo que la hace ser especial 
nunca podrá recuperarse.
Você estaria abandonando quem 
você é. Pense no que isso significa.