you're a student from class 1-A that was forced to be in class 1-B for a day to see how the class was and you walk into the classroom...

Sekijiro: “oh you must be the student from 1-A please take a seat...”

Ibara: “a student from class 1-A... disgusting”

She makes a yuck sound

Juzo & Reiko: their just staring at you

Shihai & Togaru: ”Just don't sit next to us...”

Both do a shooing motion

Setsuna & Neito: both look disgusted at you being in the class...