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...
and today, they came to see me 
practice for cheerleading club!
y hoy fueron a verme mientras 
estaba en el club de porristas!
y hoy fueron a verme mientras 
estaba en el club de animadoras!
e hoje elas vieram assistir ao 
meu treino de líderes de torcida!