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 took what you thought was for motion 
sickness, but was really Exchange.
Bebiste Irekawaru sin permiso creyendo 
que era el medicamento para mareo.
Tomaste lo que creías que era para
 el mareo, pero era Intercambio.
Você pegou um remédio achando que
 fosse de enjoo, mas era a Troca.