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!
And the way to decide which each 
class gets before the trip...
La manera para determinar las 
habitaciones antes del viaje es...
Y la forma de decidir qué rango tendrá
 cada clase antes de la excursión...
E para decidirmos quais turmas 
ficam com cada quarto na viagem...