The school infection (no cover.. yet)

The class 3F goes into a school trip that'll last three days!.. or will it?
The class prepares their bedrooms, play jokes on each other, have dinner, and, finally, go to sleep.
During the night, a classmate disappeared suddenly, and he realizes that the place where they stay is... not.. where it was before.
Further into the story, it is revealed that, Teh english teacher's husband is a scientist that is behind the work of hurting the kids... but no one knows until it's too late.

Will everyone suffer, and be transformed into monsters, known as the "infecteds", or will they manage to save themselves?