The students of Kaimei High are going on a class trip, but first, they have to participate in a rope skipping competition to see which class gets the best rooms. Saaya doesn't have an athletic bone in her body, so is worried she's going to doom her class to the worst rooms of all, until the Sket-dan tries teaching her how to skip! Then, the students are on their way, but in the back of one bus, Chuu-sensei is playing mad scientist again, and this time his victims are Bossun, Himeko, and Tsubaki!
We know her too well, though.
But I bet she's going off to practice in secret.
Todos nosotros sabemos que va a 
practicar a escondidas si dice eso.
La conocemos demasiado bien. 
Seguro que va a practicar en secreto.
Mas a gente conhece ela bem. Aposto 
que ela vai treinar sem ninguém saber.