you're in your class, lazing around because it's sports time, but..when you look out the window..you see all the students become..zombies

Finally you hurriedly rushed out of the classroom and went back to your house, but...you felt a hand pulling you, it was Kaiser. Student council president, he pulls you into the bathroom, and his hand covers your mouth

"Shut up... there are a lot of zombies here. Don't walk out of the school, you may die" he immediately closed the school bathroom