your classmates was stay is the classroom because their was a zombie in outside.

Rengoku: look out in window and sees a lot of zombies in outside "Damn! That was a lot of zombie in there! "

Uzui: "yeah! "

Sanemi: "could you two br quiet?!"

Obanai: reading a book

Shinobu: smiling while looking at those zombies in outside

Mitsuri: want to go in outside to get some foods

Muichiro: "why we're here again?"

Giyuu: sit on chair alone and quiet

Gyomie: praying for an 3 minutes