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!
You explained it in such a nonchalant way, 
but this case alone must be worth a fortune.
Está explicando como si fuera nada, 
pero solo esta caja tiene mucho valor.
Lo dice como si nada, pero sólo este
 pastillero debe valer una fortuna.
Você explicou com tanta indiferença, 
mas essa caixa deve valer uma fortuna.