Futaro is hospitalized for a while after falling sick at camp school. He returns to work tutoring the quintuplets, only to realize someone has fallen way behind.
We're on a school trip! 
Stop being a goody-two-shoes and join us!
Arrête de faire la rabat-joie,
joue avec nous, plutôt !
Siamo in gita!
Estamos em uma excursão,
Это же поездка.